Instruction: It need to cover the lid and press the protection button to start the work. Press the start button, the corresponding battery indicator lights up, and the grinding starts. Release the start button, the corresponding battery indicator is extinguished, and the grinding stops.
Battery Indicator: 3.20v-3.60v red light 3.60v-4.20v green light
Charging Indicator : Insert the USB red light flashing 3 times to enter charging. During the charging process, the corresponding battery indicator light is on and off, indicating that charging is in progress. After charging 4.15±0.05V, it will stop automatically, and the green light will be on. Unplug the USB green light will flash 3 times, exit charging, then stop working
