Xnet is a professional tattoo supplies manufacturer, we focus on the quality of the tattoo machine and the actual good operating experience, provide high quality service and product for the tattoo artist. Feature: Motor:Brushless Motor Stroke: 5.0mm Color:Silver/Black Operating Voltage: 5V-12V Battery capacity: 1800 mAh Battery working time: 6-7 hours Charging time: About 2 hours Battery interface: type-C LED Display Content: Output voltage range + battery usage+working time Instructions for use: Power ON/OFF: Long press "O" key for 3 seconds Output pause / resume: Short press "O" key to pause the output, and short press it again to resume the output(the resume voltage is the working voltage before the pause. Adjust output voltage: Press the "+" or"-" key to adjust output voltage. The voltage can be adjusted through button (+) and (-) respectively with the voltage of 0.1V on each press. When you long press the voltage adjustment buttons, the voltage will change by 0.5V each time.