description usb digital meter and tester usb-a the klein tools et910 is a usb digital meter and tester combination for most common usb-a ports, including qualcomm quick charge ports. it accurately and reliably measures and displays the usb port voltage, current, capacity, energy, and resistance simultaneously. it can also test the maximum current delivery capability of the usb port with built-in fixed loads so user need not connect to an external load. it will function with any usb-a port that has the ability to deliver power. it requires no batteries as it draws power from the power source to function. usb power meter for most standard usb-a (type a) ports. tests voltage, current, capacity, energy, resistance, max current. powered by the usb port; no batteries required. voltage and current overload detection. hi-resolution lcd for clear visibility in environments with low ambient lighting. durable cable to allow easy access to hard-to-reach ports. rugged, pocket-sized, and light weight klein industrial design stands up to jobsite demands. built to withstand a 6.6-foot (2m) drop. no batteries needed; powered by the usb port being tested. 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. california proposition 65 warning. view warning label 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 store and recall up to 10 readings voltage and current overload detection hi-resolution lcd for clear visibility in environments with low ambient lighting durable cable to allow easy access to hard-to-reach ports rugged, pocket-sized, and light weight klein industrial design stands up to jobsite demands specifications acme tools brand name klein tools acme tools part number et910 application usb port voltage, current, capacity, energy, resistance (calculated), max current assembled weight (lbs) 0.175 battery quantity required 0 battery size no battery required california proposition 65 warning required yes case color none case included no color / finish orange/black country of origin china dc polarity indicator no dc voltage 3 to 20 depth (in) 0.98 digital / analog digital digital display yes globaltradeitemnumber (gtin) 00092644691393 internal supplier part # et910 internet product code (ipc) fb97db40d10 length (in) 4.31 manufacturer warranty please refer to attached warranty document. material polymer package contents usb digital meter and tester, usb-a (type a) package depth 9 package height 1.5 package weight 0.3 package weight (lbs) 3 upc 092644691393 voltage compatibility dc only weight (lbs) 0.175 weight (oz) 2.8 width (in) 2.15