--- product_id: 145332217 title: "Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current" brand: "klein tools" price: "504 zł" currency: PLN in_stock: true reviews_count: 13 category: "Klein Tools" url: https://www.desertcart.pl/products/145332217-klein-tools-et910-usb-power-meter-and-tester-usb-digital store_origin: PL region: Poland --- # 3-20V DC voltage range Built-in test loads: 0.5A, 1A, 2A, 3A Up to 1000 hours continuous monitoring Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current **Brand:** klein tools **Price:** 504 zł **Availability:** ✅ In Stock ## Summary > 🔌 Power up your USB insights — never miss a charge! ## Quick Answers - **What is this?** Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current by klein tools - **How much does it cost?** 504 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/145332217-klein-tools-et910-usb-power-meter-and-tester-usb-digital) ## Best For - klein tools enthusiasts ## Why This Product - Trusted klein tools brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-in-One USB-A Testing:** Tests standard USB-A and Qualcomm Quick Charge ports without extra accessories. - • **Compact & Durable Design:** Credit card-sized, robust build with a bright, clear display for on-the-go professionals. - • **Long-Duration Monitoring:** Monitor voltage, current, capacity, energy, and resistance continuously for up to 1000 hours. - • **Instant Troubleshooting Power:** Identify faulty chargers and cables fast—essential for tech-savvy managers and gadget lovers. - • **Precision Voltage & Current Tracking:** Accurately measures 3-20V DC and 0.05-3A current for flawless USB diagnostics. ## Overview The Klein Tools ET910 USB Power Meter and Tester is a compact, USB-powered device designed for precise measurement of voltage (3-20V DC), current (0.05-3A), capacity, energy, and resistance on USB-A ports, including Qualcomm Quick Charge. Featuring built-in test loads and up to 1000 hours of continuous monitoring, it’s a must-have tool for professionals who demand reliable USB diagnostics and troubleshooting. ## Description Shop Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current. Free delivery on eligible orders of £20 or more. Review: An Impressive and Accurate, Must Have Tool! - This Simple and Logical to use, brilliant bit of kit, allows you to check and confirm the output values (Voltage, Current, Capacity, Energy and Resistance) of USB A and USB C charging ports, whether that be USB Wall Sockets, USB Chargers or Battery Power Banks. The ET920 unit is a little smaller than I expected, being slightly smaller than a Credit Card and if it were just a cm or two longer and wider, it would be ideal but it's not the end of the world. The unit is robustly made, the screen is well lit and all data is clearly legible and accurate, albeit some a tad small. The attached input cables are a little stiff and if the USB Socket is 'the wrong way up' (if that makes sense), you have to twist the cable to be able to view the screen but I'd rather that, than suffer flimsy cables and the pluses outweigh the negatives. It does have its limitations, in that firstly, you cannot cross the cables i.e. USB A Input must be used with USB A Output (not USB C). Secondly and this could be a Major Issue for some users, if the Input Charge stops, due to, for example, a low input voltage value, which would happen if the device attached to the output port has become fully charged, the displayed values are NOT stored on the device and are therefore lost. Conclusion: To date, I'm impresses and Well Pleased with my purchase. It could be better but..... I'll update this review if necessary but to date, Highly Recommended! Review: Useful addition to toolkit. - A well made useful tool from Klein. It will test the supply from a USB socket, show the supply voltage and how much current is being drawn from the item being charged. Well worth the money, and essential for troubleshooting phone charging issues: already found a dodgy wireless charging pad that was intermittent. ## Features - 3 to 20V DC; Current: 0.05 to 3A (monitoring mode) - Built-in test loads of 0.5A, 1A, 2A, and 3A; no external test load required - Continuously monitor up to 1000 hours of voltage, current, capacity/charge delivered, energy, and resistance (calculated) - Tests most common standard USB-A ports, including Qualcomm Quick Charge ports ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GXSRCWM | | Best Sellers Rank | 131,852 in DIY & Tools ( See Top 100 in DIY & Tools ) 195 in Voltage Testers | | Brand | KLEIN TOOLS | | Colour | Clear | | Customer Reviews | 4.4 4.4 out of 5 stars (1,594) | | Global Trade Identification Number | 00092644691393 | | Included Components | USB Digital Meter and Tester, USB-A (Type A) | | Item Dimensions | 28.5 x 5.4 x 2.5 centimetres | | Item Length | 4.31 Inches | | Item Type Name | USB Tester | | Item Weight | 2.8 Ounces | | Item Width | 2.15 Inches | | Manufacturer | Klein Tools | | Maximum Operating Voltage | 20 Volts | | Measurement Type | Electrical Measurement | | Minimum Operating Voltage | 3 Volts (DC) | | Model Number | ET910 | | Power Source | Usb-powered | | Product Warranty | 1 year manufacturer. | | Style Name | USB-A Tester and Meter | | UPC | 092644691393 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** KLEIN TOOLS - **Colour:** Clear - **Item weight:** 2.8 Ounces - **Power source:** Usb-powered - **Style:** USB-A Tester and Meter ## Images ![Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current - Image 1](https://m.media-amazon.com/images/I/51YH1Ej5hsL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ An Impressive and Accurate, Must Have Tool! *by S***B on 21 May 2021* This Simple and Logical to use, brilliant bit of kit, allows you to check and confirm the output values (Voltage, Current, Capacity, Energy and Resistance) of USB A and USB C charging ports, whether that be USB Wall Sockets, USB Chargers or Battery Power Banks. The ET920 unit is a little smaller than I expected, being slightly smaller than a Credit Card and if it were just a cm or two longer and wider, it would be ideal but it's not the end of the world. The unit is robustly made, the screen is well lit and all data is clearly legible and accurate, albeit some a tad small. The attached input cables are a little stiff and if the USB Socket is 'the wrong way up' (if that makes sense), you have to twist the cable to be able to view the screen but I'd rather that, than suffer flimsy cables and the pluses outweigh the negatives. It does have its limitations, in that firstly, you cannot cross the cables i.e. USB A Input must be used with USB A Output (not USB C). Secondly and this could be a Major Issue for some users, if the Input Charge stops, due to, for example, a low input voltage value, which would happen if the device attached to the output port has become fully charged, the displayed values are NOT stored on the device and are therefore lost. Conclusion: To date, I'm impresses and Well Pleased with my purchase. It could be better but..... I'll update this review if necessary but to date, Highly Recommended! ### ⭐⭐⭐⭐⭐ Useful addition to toolkit. *by S***R on 1 February 2022* A well made useful tool from Klein. It will test the supply from a USB socket, show the supply voltage and how much current is being drawn from the item being charged. Well worth the money, and essential for troubleshooting phone charging issues: already found a dodgy wireless charging pad that was intermittent. ### ⭐⭐⭐⭐ Nice tester *by G***D on 21 March 2025* A well designed USB power meter, it’s nice to have a unit with tails (cables) as it makes it easy to view the screen when plugged into difficult to reach sockets. Build quality seems good and measurement is accurate. I do wish however they included a power calculation and displayed the current load in Watts rather than just amps and volts with Energy. ## Frequently Bought Together - Klein Tools ET910 USB Power Meter and Tester, USB-A Digital Meter for Voltage, Current, Capacity, Energy, Resistance, Max Current - Treedix USB Cable Tester Board USB Cable Checker Data Wire with Acrylic Case Charging Test Data Line Type-C Micro Type A Type B - MakerHawk USB Multimeter USB Voltmeter Ammeter Load Tester USB Voltage Current PD Battery Power Capacity Charger Type C Meter Tester LCD Display Cable Resistance QC2.0/3.0/4.0 N10 1.44 Inch Screen --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/145332217-klein-tools-et910-usb-power-meter-and-tester-usb-digital](https://www.desertcart.pl/products/145332217-klein-tools-et910-usb-power-meter-and-tester-usb-digital) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-25*