LED USB2.0 Tester 3-bit Voltage Current Power Capacity Detector Support QC2.0 Specication: This is the mini USB (Universal Serial Bus) meter. It can measure voltage, current, power & capacity. It has three functions: Screen rotation, Power-down storage & Over-voltage & Under-voltage reminding. Technical Parameters: Physical
Size: 64 x 22 x 11mm (L*W* H, with shell version) Voltage measurement range: DC3.70 -13.0V Voltage accuracy: (0.3% + 1words) Current measurement range: DC 0.00-3.00A Current accuracy: (0.5% + 2words) Power measurement range: 0-30.00W Capacity measurement range: 0-99999m Ah Function description: 1. Screen rotation function Press the button on the back, the display interface can rotate 180 degree for being observed easily when you insert it into different side USB (Universal Serial Bus) of the computer, & automatic memory for the next boot mode. 2. Power-down storage function When power off, the accumulated MAH will be automatically stored. The stored MAH is blinking displayed after the boot. When the new MAH is up to 1 MAH, the stored MAH will be covered, & thevalueswillstartover. Counting the capacity & efficiency of the mobile power supply battery: Ah data x output voltage battery voltage efficiency = mobile power supply battery Ah (output voltage is typically 5V, the battery voltage is generally based on 3.7V, typically by 85-90% efficiency) 3. Over-voltage & Under-voltage reminding When the voltage is over 5.3V (less than 4.7V) the arrow () will be flashing. Test