1Voltage Adjust: Tattoo power supply with 4 to 12V can be adjusted, the adjust accuracy is 0.1V, which can meet the speed needs of different tattoo parts. 2RCA Interface: Wireless tattoo battery adopted RCA port, suitable for most standard RCA tattoo machines, provide firm connection, not easy to fall off. 32000mAh Capacity: Tattoo pen power supply built in 2000mAh large capacity battery, fully charged state can work continuously for 6 to 8 hours, suitable for large area tattoo. 4Display Screen: Tattoo power supply is equipped with LCD screen to display the current voltage for convenient use, which has shutdown, over charge, over release protection. 5Easy To Use: Wireless power supply get rid of the shackles of power cord, clip cord, foot pedal, which make the power supply and your tattoo pen integrated for easy operation.