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Klein Tools ET920 USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and Resistance

4.5 4.5 out of 5 stars 1,380 ratings
#1 Best Seller in Industrial Power Meters
$39.97
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Electric Circuit Testing Device
Power Meter
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Purchase options and add-ons

Brand Klein Tools
Power Source Battery Powered
Style Power Meter
Item Weight 1.7 Ounces
Item dimensions L x W x H 9.04 x 1.95 x 0.53 inches

About this item

  • VERSATILE USB TESTING: Test voltage from 3 to 20V DC and current from 0.05 to 3A (USB-A) and current from 0.05 to 5A (USB-C), covering most common standard USB ports, including Qualcomm Quick Charge ports
  • EXTENSIVE MONITORING: Continuously monitor voltage, current, capacity/charge delivered, energy, and resistance (calculated) for up to 1000 hours, providing comprehensive data insights
  • CONVENIENT DATA STORAGE: Store and recall up to 10 readings, allowing easy access to previous measurements for comparison and analysis
  • OVERLOAD DETECTION: Detect voltage and current overload, ensuring the safety and protection of your devices and power sources during testing
  • HIGH-RESOLUTION LCD: The hi-resolution LCD provides clear visibility of measurements, even in environments with low ambient lighting, ensuring easy reading of data
  • EASY SETUP: Simply connect the device in line between the source being measured and the power source for seamless and accurate measurements
  • RUGGED DESIGN: Durable, pocket-sized and light weight design with 6.6 ft. (2 m) drop protection stands up to jobsite demands

Frequently bought together

Klein Tools ET920 USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and Resistance
$39.97
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Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacle
$21.97
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Klein Tools RT310 Outlet Tester, AFCI and GFCI Receptacle Tester for North American AC Electrical Outlets
$39.97
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 9.04 x 1.95 x 0.53 inches; 1.7 ounces
  • Item model number ‏ : ‎ ET920
  • Department ‏ : ‎ Unisex-Adult
  • Batteries ‏ : ‎ 1 Unknown batteries required.
  • Date First Available ‏ : ‎ August 29, 2018
  • Manufacturer ‏ : ‎ Klein Tools
  • ASIN ‏ : ‎ B07GXZHPVR
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,380 ratings

Product Description

The Klein Tools ET920 is a USB digital meter for Type-A and Type-C ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy, and resistance simultaneously. It can function with any USB-A and most USB-C ports, including Qualcomm Quick Charge ports that have the ability to deliver power. It requires NO batteries as it draws power from the power source to function. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Important information

Safety Information

To ensure safe operation and service of this meter, follow all instructions. Failure to observe warnings can result in severe injury or death.This meter will NOT display current below 50 milliamperes, even if it is allowing this to pass through. NOTE: The display will show zero current.Do NOT use with ports that operate outside of the rated voltage and current. NEVER use on a circuit with voltage or current that exceeds the maximums specified for this device.Do NOT use during electrical storms or in wet weather. Do NOT use if meter appears damaged. Use caution when working with voltages above 25V RMS or 24V DC. Such voltages pose a shock hazard.

From the manufacturer

Klein Banner
300: 400

Klein Coin
About Klein Tools

As an American manufacturer of hand tools for more than 160 years, Klein Tools makes premium-quality, professional-grade tools that deliver performance, durability and precision. Our team continues to put six generations of expertise into each tool by using the highest quality materials and superior workmanship.

Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day. Since 1857.

USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and Resistance

The Klein Tools ET920 is a USB digital meter for Type-A and Type-C ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy, and resistance simultaneously. It can function with any USB-A and most USB-C ports, including Qualcomm Quick Charge ports that have the ability to deliver power.

  • 3 to 20V DC; Current: 0.05 to 3A (USB-A); 3 to 20V DC; Current: 0.05 to 5A (USB-C)
  • Continuously monitor up to 1000 hours of voltage, current, capacity/charge delivered, energy, and resistance (calculated)
  • Tests most common standard USB-A or USB-C ports, including Qualcomm Quick Charge ports
  • Store and recall up to 10 readings
  • Voltage and current overload detection
  • Hi-resolution LCD for clear visibility in environments with low ambient lighting
  • Rugged, pocket-sized, and light weight Klein industrial design stands up to jobsite demands
  • Device must be used in line between source being measured and power source

FEATURES

Klein Tools

Klein Tools

Klein Tools

USB Power Meter for any USB-A and most USB-C Ports

Monitors Voltage, Current, Capacity, Energy and Resistance

Powered by the USB port; no batteries required

150: 300 1 150:300 2 klein klein
ET900 ET910 RT110 RT210
Customer Reviews
4.5 out of 5 stars
1,380
4.5 out of 5 stars
1,380
4.8 out of 5 stars
2,908
4.8 out of 5 stars
8,583
Price $17.99 $43.99 $9.97 $12.97
Mfg. No. ET900 ET910 RT110 RT210
Description USB Digital Meter, USB-A (Type A) USB Digital Meter & Tester, USB-A (Type A) Receptacle Tester GFCI Receptacle Tester

What's in the box

  • Tools & Accessories

    • Product guides and documents

    Instructions for Use (IFU) (PDF)

    Looking for specific info?

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    1,380 global ratings

    Customers say

    Customers like the quality and ease of use of the electric circuit testing device. For example, they mention it's well made, simple to use, and easy to test. That said, opinions are mixed on usb-c connectivity, readability, and performance.

    AI-generated from the text of customer reviews

    91 customers mention75 positive16 negative

    Customers like the quality of the electric circuit testing device. They say it's very useful to determine the quality USB cables, well-made, and of good Klein quality. They also say the ports and plugs seem high-quality. Overall, customers say it’s a great product and easy to use.

    "...With it, I am able to measure and display important information such as USB port voltage, current, capacity, energy, and resistance, providing..." Read more

    "...You don't know what your missing. I like the different information on the display...." Read more

    "...It even has a memory!All in all it's a very cool device and I'm glad I have it." Read more

    "This is a great ammeter. Includes both USB-A and USB-C cables. The cables are highly preferred instead of a direct male port...." Read more

    32 customers mention32 positive0 negative

    Customers find the electric circuit testing device simple to use. They say it makes it easy to test, determine if a USB port is bad, and take measurements. Customers also say it's a toolkit friendly version and a great troubleshooting device.

    "Very easy to use. Good value." Read more

    "...Good tool to own especially if it’s pulling too much or too little" Read more

    "...resistance all work great, just plug it in look at the screen, very easy to use...." Read more

    "...A bit expensive, but well worth the ease of use. Highly recommend." Read more

    95 customers mention66 positive29 negative

    Customers are mixed about the performance of the electric circuit testing device. Some mention it works great and gives valuable data, while others say it's not usable when trying to troubleshoot USB-C laptop docks and has extremely limited use.

    "...It does not fry it which is great. Works great otherwise. Gives you time, mAH, Wh, Volts, Amps, and type of usb being used...." Read more

    "Pros: works and seems to give accurate readings. This includes voltage, current, and power drained so far (in mAh)...." Read more

    "...It works well and has plenty of features. It has a lead on one of the USB-C ends as well which helps with device arrangement...." Read more

    "...-C device do to apple non standard USB-C dc power wiring the klein meter will not work, also the meter has usb input and output that must be correct..." Read more

    51 customers mention17 positive34 negative

    Customers are mixed about the USB-C connectivity of the electric circuit testing device. Some mention it's a great tester for any USB port, with integral support for USB-A and USB- C. The feature set is helpful for testing USB plugs, and versatile with USB C and Micro. Pigtail leads allow positioning for reading display. However, others say that the USB C input never worked, and the current reading didn't work.

    "...no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C device do to apple non standard USB-C dc..." Read more

    "This is a great ammeter. Includes both USB-A and USB-C cables. The cables are highly preferred instead of a direct male port...." Read more

    "...I thought my meter was broken and the USB C cable did not work.I used an Apple USB C charger for this test...." Read more

    "...review awarded this 2 stars because it seemed the USB-C current reading didn't work...." Read more

    27 customers mention15 positive12 negative

    Customers are mixed about the readability of the electric circuit testing device. Some mention it has an easy to read display that is readable in almost any light. They like that they can read the display even if the port is upside down. However, others say that the readout display color digits are so small barely readable without magnifying glass. They also say that it's rather limited and the numbers are small to read.

    "...The display is large and easy to read. It's also lightweight." Read more

    "...the graphics are not great but work with no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C..." Read more

    "...Excellent build quality, large screen, so much easier to read. I’m surprised to see a memory feature to store past results...." Read more

    "...There are two sizes to display the voltage and current. The small size is too small and the large size results in the screen being too crowded." Read more

    works great, USB-C and USB-A all work good, saves time, easy to use
    5 Stars
    works great, USB-C and USB-A all work good, saves time, easy to use
    the Klein Tools ET920 USB Power Meter, USB-C and USB-A Digital Meter for Voltage, Current, watts, resistance all work great, just plug it in look at the screen, very easy to use. the graphics are not great but work with no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C device do to apple non standard USB-C dc power wiring the klein meter will not work, also the meter has usb input and output that must be correct or meter will not work properly. USB-C works fine with the standard USB-C DC Power wiring. Film and TV Engineering for 25 years.
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    Top reviews from the United States

    subprime customer
    5.0 out of 5 stars Love it
    Reviewed in the United States on April 20, 2024
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    Very easy to use. Good value.
    Helpful
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    Andrew21kg
    5.0 out of 5 stars Good for testing anything
    Reviewed in the United States on March 29, 2024
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    It’s Klein tools. And secondly anything that uses these ports, you can identify a load if it exists. Good tool to own especially if it’s pulling too much or too little
    Helpful
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    J. Williams
    4.0 out of 5 stars It works good but has one issue.
    Reviewed in the United States on September 30, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    When using this to test usbc at 100 watts it will shut off on its own due to the limit of 100 watts max. As soon as it goes over that it resets. It does not fry it which is great. Works great otherwise. Gives you time, mAH, Wh, Volts, Amps, and type of usb being used. Something to note, when using the usbc make sure the device you are trying to charge or run is connected or it will not power up. Usba powers up if you have the device plugged into this device or not but usbc wont unless you have the device you are using plugged into the klein meter.
    3 people found this helpful
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    Sam Fisher
    5.0 out of 5 stars Versatile USB Power Meter: Accurate Measurements with Enhanced Features
    Reviewed in the United States on October 19, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    This power meter is very versatile as it allows me to test voltage and current in USB connections. It can measure voltage from 3 to 20V DC and current from 0.05 to 3A (USB-A) or 0.05 to 5A (USB-C). This wide range covers most standard USB ports, including Qualcomm Quick Charge ports. With it, I am able to measure and display important information such as USB port voltage, current, capacity, energy, and resistance, providing valuable insight into my USB power usage on various devices.

    I would be nice if it kept the data after a low current draw or power cycle instead of instantly shutting off.

    It is important to note that USB Type-C connections operate with efficiency and safety in mind meaning the the charger will only supply power when it detects a device connected to the other end. If no device is connected, the power meter will not power up as it doesn't receive any power from the charger. This feature prevents unnecessary power wastage and reduces potential electrical hazards.
    2 people found this helpful
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    Troy
    5.0 out of 5 stars Great for troubleshooting those USB connection ghosts.
    Reviewed in the United States on February 19, 2024
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    Arrived quickly packaged well. You don't know what your missing. I like the different information on the display. Helped me track down a device that was drawing more power than the system could provide.
    Helpful
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    Be Happy
    5.0 out of 5 stars works great, USB-C and USB-A all work good, saves time, easy to use
    Reviewed in the United States on December 8, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    the Klein Tools ET920 USB Power Meter, USB-C and USB-A Digital Meter for Voltage, Current, watts, resistance all work great, just plug it in look at the screen, very easy to use. the graphics are not great but work with no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C device do to apple non standard USB-C dc power wiring the klein meter will not work, also the meter has usb input and output that must be correct or meter will not work properly. USB-C works fine with the standard USB-C DC Power wiring. Film and TV Engineering for 25 years.
    Customer image
    Be Happy
    5.0 out of 5 stars works great, USB-C and USB-A all work good, saves time, easy to use
    Reviewed in the United States on December 8, 2023
    the Klein Tools ET920 USB Power Meter, USB-C and USB-A Digital Meter for Voltage, Current, watts, resistance all work great, just plug it in look at the screen, very easy to use. the graphics are not great but work with no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C device do to apple non standard USB-C dc power wiring the klein meter will not work, also the meter has usb input and output that must be correct or meter will not work properly. USB-C works fine with the standard USB-C DC Power wiring. Film and TV Engineering for 25 years.
    Images in this review
    Customer image
    Customer image
    2 people found this helpful
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    Suhr
    5.0 out of 5 stars USB C Not Working? READ THIS
    Reviewed in the United States on June 16, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    If you attach the meter to a USB C charger, you would expect it to work just like when you attach it to a USB charger or port.
    I thought my meter was broken and the USB C cable did not work.
    I used an Apple USB C charger for this test.
    Sure enough, nothing happened and the meter appeared broken on delivery.
    Since I am an engineer I ask technical question and make technical tests. (politicians and shrinks hate me)
    I asked, what if the charger has a sensor to detect an attched device to charge?

    The answer is, YES, some chargers do have a sensor to detect an attached device and they do not supply any current until a device is attached.
    This is true for more than just chargers.
    USB C is somewhat sophisticated.

    Once I attached a laptop to my Apple charger through the meter, everything worked perfectly.
    When using the USB C cable on this meter, make sure you have something attached that draws current or it will appear the meter is broken. (no current is supplied to the meter for it to work)
    The standard USB cable does not require that.
    21 people found this helpful
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    M. Gorelick
    5.0 out of 5 stars Very informative piece of gear.
    Reviewed in the United States on July 26, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    Ever wonder how much power your USB charger is actually providing to the device? I sure have. Place this device in line (plug meter into charger port, device to be charged into the meter) and it will immediately light up and report how many volts and amps are being consumed. It also reports how many mAh and Wh have gone across the meter and over what period of time. There's a minor restriction in that the meter has to be across either the USB-A or the USB-C side entirely, meaning you can't plug the meter into USB-C and then charge something that's USB-A or vice-versa. This is no big deal in practice, though. It even has a memory!

    All in all it's a very cool device and I'm glad I have it.
    2 people found this helpful
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    Top reviews from other countries

    Translate all reviews to English
    Garrett T.
    5.0 out of 5 stars Klein>Cheapnese
    Reviewed in Canada on September 4, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: USB-A MeterVerified Purchase
    Excellent. Handy AF! We'll worth $20. Same price as the cheap chinese alternative.
    Report
    J Tanner
    5.0 out of 5 stars Great meter
    Reviewed in Canada on January 23, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    I have used this meter for both USB A and USB C testing and both worked great. The trick on USB C is that it cannot be converted to anything other than C in the entire path. That makes testing some combinations tricker. Over all it does what it claims to very well.
    Report
    Hazael Trejo
    5.0 out of 5 stars Lo mejor que he encontrado en Amazon.
    Reviewed in Mexico on February 22, 2022
    Pattern Name: Electric Circuit Testing DeviceStyle: USB-A MeterVerified Purchase
    Para ser un producto de importación y más de estado unidos llegó muy rápido, este dispositivo lo ocupo para realizar mediciones de voltaje y amperaje en equipos celulares con esto me doy cuenta si está cargado correctamente o si tiene problemas los centros de carga, cable o el mismo cargador, he utilizado algunos medidores chinos pero solo duran un par de meses y empiezan a fallar pero con este va genial es más preciso y además la calidad se nota en los materiales, lo recomiendo mucho es de lo mejor que te puedes encontrar en Amazon.
    Report
    Mat
    5.0 out of 5 stars Excellent
    Reviewed in Canada on May 16, 2021
    Pattern Name: Electric Circuit Testing DeviceStyle: USB-A Tester and MeterVerified Purchase
    Great Klein product. Test feature is a huge plus. I Bought it to test loads on my usb/ plug and usb power supplies laying around .

    Does everything it advertises, easy to use
    Report
    Wayne Wilmot
    5.0 out of 5 stars Nifty Tool for Computer Setup
    Reviewed in Sweden on October 31, 2023
    Pattern Name: Electric Circuit Testing DeviceStyle: Power MeterVerified Purchase
    I use this a lot to test voltage and amps drawn by a number of USB devices hooked up to unknown USB power sources, especially outputs from monitors and computers. Great tool. Highly recommend.
    Report