Feature:1. Adjustable Voltage: 412V voltage adjustment with 0.1V precision, meeting the speed requirements for tattooing different areas.2. Large LED Display: The digital display screen provides accurate voltage output reading for precise tattooing. With a built in 1300mAh battery, it can work continuously for approximately 48 hours on a full charge.3. Lightweight And Compact: The power supply seamlessly integrates with your tattoo pen, ensuring easy and comfortable handling.4. Standard RCA Interface: Suitable for most tattoo machines with RCA interface, ensuring a secure and stable connection.5. Convenient Operation: Say goodbye to the need for multiple accessories like power cords, foot pedals, and clip cords, making tattooing more convenient.Specification:Item Type: Tattoo Power SupplyMaterial: Aluminium alloy, electronic componentsSize: Approx. 32 x 63mm / 1.3 x 2.5inBattery: Lithium battery 1300mAh (built in)Output Voltage: 4-12V adjustableVoltage Adjustment Accuracy: Short press 0.1V, long press fast adjustmentPower Connector: RCA connectorCharging Interface: USB Type CCharging Voltage: DC5V /1ACharging Time: About 3 hoursBattery Life: 4-8 hoursStrong Start Function: After power on, press and hold the "+, -" key at the same time for 3 seconds, you can turn on/off the strong start function.LED Screen Display: Current voltage, remaining battery power.Package List:1 x Wireless Tattoo Power Supply1 x USB Charging Cable1 x Finger Switch1 x User Manual