Feature:1. ADJUSTABLE 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.2. LCD 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.3. LIGHTWEIGHT 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.4. STANDARD 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.5. RECHARGEABLE BATTERY: Tattoo power supply has a built in 1600mAh high capacity battery that can provide 812 hours of normal use after a 6hour charge.Specification:Item 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 List:1 x Wireless Tattoo Power1 x USB Charging Cable