Features1ADJUSTABLE VOLTAGE: Wireless tattoo power supply allows for adjustable voltage in the range of 4?12V, 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 8?12 hours of normal use after a 6?hour charge.SpecificationItem Type: Tattoo Power SupplyMAterial: Aluminum alloy, electronic componentsInterface: RCA interfaceBattery: Built in 1600mAh lithium batteryPower Supply Size: Approx. 30 x 50mm / 1.2 x 2inInput Voltage: 5VOutput Current: 50-1000maPower: 0.5-12WOutput Voltage: 4-12VVoltage Regulation Accuracy: Short press to adjust 0.2V, long press for fast adjustmentDisplay Screen: Displays current voltage and remaining battery powerCharging Time: 6 hours (high voltage charger over 5V is strictly prohibited)Charging Interface: Micro USBWorking Time: 8-12 hours of normal use.Package List1 x Wireless Tattoo Power 1 x USB Charging Cable