Wireless Tattoo Power Supply

Full charge for first use
Press the five-way switch in the middle: Long press on/off, short press pause/start
The top and bottom of the five-way switch are voltage plus and minus (0.5V per voltage adjustment)
Press right to display the power percentage, and press left to return the voltage interface
If power less than 19%, charging lamp will flash: plug in charger and the lamp stay on
100% full power, full power display light on