1ADJUSTABLE VOLTAGE: Wireless tattoo power supply allows for adjustable voltage in the range of 412V, with precision of 0.2V, making it perfect for meeting the speed requirements of different tattooing areas. 2LCD DIGITAL DISPLAY: The large display screen on our power supply shows current voltage and remaining battery power, providing you with accurate information and easy operation. 3LIGHTWEIGHT AND PORTABLE: Tattoo power supply is compact and lightweight, making it easy to maneuver during tattoo sessions and integrate seamlessly with your existing tattoo pen. 4STANDARD RCA INTERFACE: Tattoo power supply features a standard RCA interface that fits most RCA interface tattoo machines, with a secure and stable connection that will not come loose during use. 5RECHARGEABLE BATTERY: Tattoo power supply has a built in 1600mAh high capacity battery that can provide 812 hours of normal use after a 6hour charge.