J7-4T OLED USB Tester

This OLED USB tester can monitor voltage, current, capacity, electric quantity, power, load impedance, D+ / D- voltage, charging time and other data of USB, and supports Qualcomm QC3.0 (compatible with QC2.0), BC1.2, and Apple 2.4A and other protocol  quick charging voltage ranges. Capacity, electrical voltage, time, power cut down memory data can be saved. Key Function: - Long press: display after-sale interface on the front page; the reset function on the interface of magnification capacity and electric quantity  - Double-click: capacity zero clearing - Three-click: electric quantity zero clearing (electric quantity and capacity with PW CUT MEMORY) - Four-click: cumulative time reset to zero - Five-click: enter into charging timing and cut-off duration settings