Features: 1.With the LCD design, its very convenient and quick for you to see and know information on it. 2.The screen can display the charging status, voltage, current, capacity and working time of the device at the same time. 3.Power off storage function, can store the capacity and energy data when the mobile power is cut off, which is convenient for subsequent inspection. 4.No need for professional wiring, as long as the USB port is plugged in, you can real?time detection of USB power charging status, voltage. 5.Owing to its compact and light size, makeing it easy and convenient to carry and store. Specification: Item Type: USB Tester_x000D_ Material: ABS_x000D_ Size: Approx.73 x 23 x 13.5mm/2.9 x 0.9 x 0.5in (lenth x width x height)_x000D_ Input/Output Voltage: 3.5-20V, Resolution: 0.01V_x000D_ Input/Output Current: 0-3.3A, Resolution: 0.01A_x000D_ Accuracy: 1% PackageList: 1 x USB Tester 1 x Instruction