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Eversame Power Meter Tester -Each Power Meter tester from Eversame will be strictly tested by our QC Department, to prove the importance we set on quality. -Perfect for evaluating whether or not the computer, USB wall charger, USB car charger are outputting acceptable voltage and current range for the device you are connecting -This Power Meter Tester can plugs directly into any USB socket or cable, which displays on the screen the voltage, current and capacity -It provides you a rough estimate of the capacity of the device you are charging Specification Input Voltage: 3V-30V Input Current: 0-5.1A Accuracy: +/- 1% Display: LED, show voltage and current simultaneously Maximum Capacity Value: 99999 mAh Tester three dimensional size: 60*24*14mm Warm Tips -This power meter tester may not support fast charging for some type of smartphones and devices. -If any tester you bought from Eversame can't display the correct parameters while testing your devices, please feel free to contact us firstly and our customer service team will provide quick respond and offer good solution for your compensation. Package Included 2 x Current Voltage Test Meter Easy-To-Reach Support Every product includes one year hassle-free guarantee with excellent after-sale service