Features: 1Wireless power supplies provide efficient performance. Light weight, unique designs. 2Adjustable voltage, 5?12V voltage is adjustable, each press of the up or down key can increase or decrease 0.5V, simple operation. 3LCD screen, real?time display of remaining power and voltage. 4Protection mechanism, both battery and control board have shutdown, overcharge and overdischarge protection functions. 52 kinds of interfaces are optional, suitable for tattoo machines with standard RCA interface or DC interface with a diameter of 5.2mm Condition: 100% Brand New Item Type: Tattoo Power Supply Material: Aviation Aluminum Alloy Brand: GHOST AXE Optional Type: RCA, DC Aperture Size: Length: Approx.8mm/0.31in Outer Wall Diameter: Approx.5.2mm/0.20in Aperture: Approx.2.1mm/0.08in (DC plug with hole pin 2.00mm) Built-In Battery: Lithium ion battery, 2000mAh Output Voltage: 5-12V Charging Cable Interface: Type-C interface Instructions for use: 1. Long press the power button for 2 seconds to turn on and off the machine, and the remaining power and real-time voltage are displayed at this time 2. Short press the up key or down key to add or subtract 0.5V voltage 3. Short press the power button to pause 4. Long press the power button for 2 seconds to shut down Endurance Time: It can be used for about 8 hours under full power of 8V. Package Included: 1 x Tattoo Power Supply1 x Charging Cable&nbsp