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 of the computer, and automatic memory for the next boot mode.
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, and thevalueswillstartover. Counting the capacity and efficiency of the mobile power supply battery: Ah data x output voltage Ă·battery voltage Ă· 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)
Over-voltage and Under-voltage reminding:When the voltage is over 5.3V (less than 4.7V), the arrow ? (Ë‡) will be flashing
Package Included: 1 x 0-3A OLED USB Charger Capacity power Current Voltage Detector Tester Meter Blue 0-3A OLED USB Charger Capacity power Current Voltage Detector Tester Meter Blue