Feature:1. 412V ADJUSTABLE VOLTAGE: Easily adjust the voltage to meet the speed requirements for different tattooing areas with a precise of 0.1V.2. STANDARD RCA INTERFACE: Tattoo power supply compatible with all standard RCA rotary tattoo machines, providing a secure and stable connection.3. WIRELESS DESIGN: Wireless tattoo power supply no need for power cords, foot switches, or clip cord, making it more convenient for tattoo artists.4. LONG BATTERY LIFE: Equipped with a built in 1600mAh high capacity battery, it can be fully charged in 11.5 hours and provide approximately 45 hours of continuous work.5. LCD DISPLAY: The display screen shows the current voltage, remaining battery level, and operation duration. It also features shutdown, overcharge, and over discharge protection functions.Specification:Item Type: Wireless Tattoo Power SupplyMaterial: Aluminum alloy, electronic componentsInterface: RCA InterfaceBattery: Built in Lithium Battery 1600mAhPower Supply Size: Approx. 75 x 30mm or 3 x 1.2inInput: DC5V 1AOutput: 4-12VOutput Voltage Adjustment Precision: 0.1V, Long press for quick adjustmentDisplay Screen: Displays current voltage, remaining battery level, and working durationCharging Time: 1-1.5 hours (Using chargers with voltage not exceeding 5V is strictly prohibited)Usage Time: Approximately 4-5 hours of continuous use. .Package List:1 x Wireless Tattoo Power Supply1 x USB Charging Cable