The simplicity and portability opration of Ambition wireless tattoo power will help you to conquer your tattoo. Feature: Material : aluminium alloy+high quality insulating plastic+silicone keys. Connector :RCA Battery Capacity: 2400mAh Charging time : About 3 hours Operation time : Under normal 8V voltage, the voltage stable state can last for 10 hours,long time working the voltage is stable. Output voltage : 4-12V, ±0.1V 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. 12V jumpstart function,double-click the power button to turn on(J)/turn off(S) the jumpstart. Power: The LED display will show the remaining power, and the full power will display 4 divisions. Fast charging through the matching fast-charging cable can usually be fully charged in 3 hours. Please pay attention to the change of power at any time to prevent sudden power loss from affecting your tattooing work.