Quick Summary: Klein Tools ET920 USB Meter Honest Review
- Content Type: Hand Tested Review
- Last Updated: July 3, 2025
- Fact-Checked By: Author Himself
- Rating: 4.3/5
- Best For: Professionals like electricians, IT experts, and serious tech fans needing very accurate and reliable USB testing.
- What’s Great: Checks voltage, current, capacity, energy, and resistance at once. Works with both USB-A and USB-C. Very strong design, can survive drops from 6.6 feet. Does not need batteries; gets power from the USB port. Can watch power for up to 1000 hours and save 10 readings. Good accuracy (around 1 percent).
- What’s Not: USB-C functionality can have problems and may not work with all chargers/devices. Costs more than many other USB testers. Does not show currents below 50 milliamperes (0.05A).
- Buy If: You need a very tough and accurate USB meter for professional or serious use. You mainly need to test USB-A connections. You want to monitor power for long times.
- Avoid If: You mostly need to test USB-C connections and need it to work perfectly every time. You only need basic, occasional USB testing and want a cheaper tool.
- Affiliate Link Present: Yes
- Price at Review Date: About $39.97 USD to $51.99 USD (on Amazon, CPO Power Tools).
- Available At: Amazon, CPO Power Tools, and other sellers in different countries.
Do you ever wonder what happens when you plug your devices into a USB port? The Klein Tools ET920 helps you find out. It gives you correct information.
This small USB digital meter checks voltage, current, capacity, energy, and resistance. It checks all these things at the same time for USB-A and USB-C connections. I think the ET920 is very helpful. It can watch power delivery for up to 1000 hours without stopping. This helps me learn how my devices charge over time. It can also save and show up to 10 readings. This makes it easy to compare different power sources. The design of the Klein ET920 USB power meter is special and strong. It can survive a drop from 6.6 feet. What I like the most is that it does not need batteries. It gets power from the USB port it is testing. In this review of the Klein Tools ET920, we will see if this digital meter is worth its cost.
Price Now: $39.97
The Klein Tools ET920 USB meter has different prices. It depends on where you buy it. On Amazon, it costs about $39.97 USD. Adding shipping might make it $49.72 USD. At CPO Power Tools, you can get it for $49.97 USD. This is a small drop from its first price of $51.99. Sellers in other countries list it closer to €34,95 EUR.
These prices make the ET920 one of the more expensive USB testers. My research shows the cost has stayed about the same. This means Klein Tools thinks this is the right price for what it can do.
Disclaimer
Affiliate Disclaimer
I want to be 100% honest with you. Some links you see in my post are ‘affiliate links’. This just means if you click one of my links and then buy a tool, I get a very small money from the shop.
This does not cost you any extra money at all. The price is the same for you.
This small help lets me keep this blog alive and test more tools for you. Please know, I only link to tools I have used myself or received a verified review of the tool and believe are good. My words and my review are my own, nobody pays me to say nice things. Thank you for your support!
Image Information
All product images used in this post are provided by the author and claimed to be their own usage. According to the author, these images are either self-clicked, taken during hands-on testing, or screenshots captured for review purposes. If you believe any image violates your rights, please contact us for proper credit or removal.
Price & Stock Information
The product prices and availability mentioned in this post are accurate as of the time of publishing. However, prices may change on the seller’s website without notice. Please always check the latest price and stock status on the official product page before making a purchase decision.
Can’t wait to read the review?
- 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 (US…
- EXTENSIVE MONITORING: Continuously monitor voltage, current, capacity/charge delivered, energy, and resistance (calculat…
- CONVENIENT DATA STORAGE: Store and recall up to 10 readings, allowing easy access to previous measurements for compariso…
If It’s Expensive
We know that Klein Tools ET920 USB Meter is a great tool, but if you think it’s expensive for you, we have also find a great alternative of it. Here it is.
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Klein Tools ET920 USB Meter: Features and Device Fit
The Klein Tools ET920 is a useful tool for testing. It works with both old and new USB connections. Here is more about its features and where it works well.
USB Compatibility: USB-A and USB-C
The ET920 works for testing USB-A and USB-C connections. This makes it good for testing almost any USB port. It works with all USB-A ports. It also works with most USB-C ports that give power. This is good because more devices now use USB-C, but old USB-A ports are still used.
Measurement Ability: Voltage and Current
This digital meter works with a wide voltage range of 3 to 20V DC for both port types. The current testing range changes based on the port. USB-A ports can measure from 0.05 to 3A. USB-C ports can measure a wider range of 0.05 to 5A. These features help the ET920 check everything. This includes charging small things and fast charging for big devices.
Quick Charge and Device Compatibility
The ET920 works well with the newest charging technology. It works with Qualcomm Quick Charge® ports. This makes it good for testing fast-charging on new phones and tablets. It also helps measure power delivery for advanced USB-C setups. But it has trouble with a few special types of connections.
Durability and Protection
Klein Tools made the ET920 to be tough. This small, strong tool uses industrial-level materials. These materials can handle hard job site places. It is special because of its drop protection up to 6.6 feet (2 meters). This lets it survive drops that would break normal consumer models. It also has an IP20 rating for protection from dust and water. It works between 14° and 122°F (-10° and 50°C).
The ET920 can measure more than just basic voltage and current. It also checks resistance (up to 400 ohms maximum). It finds out capacity and energy flow. This device does not need batteries. It gets power right from the port it tests. Its small size is 2.95 inches by 1.96 inches by 0.6 inches (75 × 50 × 15 mm). It weighs 1.7 ounces (49 g). This makes it easy to carry. Both technicians and power users can take it anywhere.
Features of the Klein Tools ET920
The Klein Tools ET920 has more than just simple connection functions. It has advanced tools that make it different from other USB meters. Let us see why experts and tech fans find this device helpful.
Live Tracking: Voltage, Current, and Capacity
The ET920 gives real-time information. It covers many USB port measurements. This meter shows voltage, current, capacity, energy, and resistance all at once. What is special is that it can watch these numbers without stopping for up to 1000 hours. This makes it good for long tests or to find power problems that happen sometimes. It can measure voltages from 3 to 20V DC. It supports currents up to 3A with USB-A connections and 5A with USB-C.
Data Logging: Save and Review 10 Readings
The ET920 has a memory feature that is special. To save data during a test, hold the Mode button for about 3 seconds. You will see the memory slot light up. The device can save up to 10 different readings to check later. This helps you compare power sources or see changes over time. Each saved reading also shows if it came from USB-A or USB-C. It is marked as M:1A or M:1C. If you want to clear all saved data, simply hold down the Mode button for five seconds. It will erase everything.
USB-Powered Design: No Batteries Needed
The ET920 is different from most testing tools because it works without batteries. It takes a small amount of power directly from the USB port it checks. This smart design saves users from changing batteries. It also makes the tool more reliable. It is always ready to use. Even with low power use, the meter keeps working during long tests.
The LCD display is easy to read even in low light
The LCD screen has high resolution. This makes it easy to read even in places with little light. This is helpful when using tools in server rooms, behind desks, or other dark areas. Users can change between standard and advanced screen modes. This lets them choose how they see information. When connected, the screen first shows the Klein Tools logo. Then it changes to the measurement screen and starts collecting data right away.
Real-Life Testing: Comparing USB-A and USB-C Performance
I used the Klein Tools ET920 for several weeks. I tested its USB-A and USB-C features in real situations. My tests found some important differences between the two ports. Buyers need to know about these.
USB-A Accuracy and Practical Examples
During my tests, the USB-A part of the ET920 worked in different charging situations. The meter gave correct readings across its 0.05 to 3A current range. This range is good for common devices like tablets, phones, and other tech things.
One thing to remember about the ET920: it will not show currents under 50 milliamperes. It will just show zero. But power still flows through. This is not a big problem for most uses. But it might matter when testing devices that need very little power.
The USB-A port works well when you need it to:
- Charge older devices or use older power adapters
- Support standard 5V USB devices that need between 2.5W and 12W of power
- Find out which chargers work best to power your devices
USB-C Challenges and Solutions
The USB-C part has good features, like supporting up to 5A current. But it has real problems. During my tests, sometimes USB-C connections did not work. Even though the same chargers worked with USB-A.
Other users have said they had similar problems. Some said that “USB-C did not work with any chargers” they tried. Because of this, I used the USB-A port for most of my tests. It worked well enough to get useful data. But it stopped the device from showing its full power.
Tests with Pixel 7 Pro and Other Devices
I tested the ET920 with a Pixel 7 Pro. Like others have seen, the USB-C feature did not work well with this phone. But its USB-A testing was useful. It helped check which chargers support fast charging for modern phones.
The meter easily found Qualcomm Quick Charge ports. This made it simple to tell the difference between normal and faster charging options. To make charging better, this feature alone might make it worth buying. Even with the USB-C problems.
The ET920 works very well as a USB-A tester. But it does not work well with USB-C connections. USB-C is becoming the main standard. So, these problems could be important to think about if you plan to use this device for a long time.
Comparing Price and Value Against Other USB Testers
To pick testing tools, it is important to compare cost with how well they work. Also, compare the features they have. The Klein Tools ET920 costs more. Is it worth the cost for what it gives? Let us see how it compares to similar choices.
Comparing with Eversame and YOJOCK Testers
The Klein Tools ET920 costs much more than other options like the Eversame 2-in-1 USB Tester. The Eversame has similar features but costs much less. Both devices check voltage, current, capacity, and energy. But the price difference is big.
What makes the Klein ET920 special:
- Strong design built to survive drops up to 6.6 feet
- Works with both USB-A and USB-C connections
- Better accuracy (around 1 percent) compared to others
- Can keep watching for as long as 1000 hours
On the other hand, cheaper choices like the Eversame offer simpler things.
- Detects current in both directions
- Uses TFT screens
- Smaller and easier to carry
- Costs much less
Comparison Table: Klein Tools ET920 vs. Eversame 2-in-1 USB Tester
Klein Tools ET920
Eversame 2-in-1 USB Tester
Is the ET920 Worth Spending Extra?
People who only need to check basic charging might not want to spend more on the Klein ET920. One user even said, “For the price, it should do more”.
But, professionals who need something exact and reliable might see it as good. Reviews say that the ET920 gives more correct readings than some cheaper testers made in China. Klein Tools has made good testing tools since 1857. So, buying this means you are getting quality and expert work.
In the end, if the ET920 is worth its higher price depends on what you need it for. Electricians, IT experts, or serious tech fans who want very high precision and reliability will find the extra cost fine. But if you need a tool for simple tasks sometimes, cheaper options could work well enough.
Should You Buy the Klein Tools ET920?
I tested the Klein Tools ET920 a lot. I now have a clear idea of what it offers. The tool shows strong technical features in its USB-A parts. It measures many things at once with good accuracy. This makes it better than cheaper models. Also, its toughness is clear. During my tests, it survived many accidental falls. This proves what the company says about 6.6-foot drop protection.
But, the USB-C problems are a big negative point. Users who use USB-C chargers a lot might get annoyed by its changing results with different chargers. Klein Tools made this meter strong. But it is not clear if the high price makes up for these problems.
The ET920 is best for professionals. They need tools they can trust for accuracy and reliability. Electricians, IT pros, and serious tech fans will like its exact readings, ability to save data, and tough design. But casual users might like cheaper options. These give basic features without the strong build meant for hard use.
This USB meter does what Klein Tools says it will. It is a reliable and strong tester. It is made to handle tough conditions and give exact measurements. The cost matches its high-level place. If spending $40-55 is fair depends on what you need it for. I think it is best for people who see testing tools as a long-term value. Not just a quick buy. The ET920 shows good engineering. But its USB-C features could be better in the future.