Tattoo Power Supply factory Style: Power Supply Tattoo Size: 85X25X95 mm Volt Level: 3-12V 3A; Output power: 30W Material: High quality PPC Input Voltage: AC100-240V-50-60HZ,DC12/2A Operation Instruction: 1.TP-7 tattoo power supply compatible with all coil and rotary tattoo machines. 2.Stable performance, durable and safe for long time tattoo working. 3.Bright LCD display makes you more convenient with the tattoo work. 4.Adjust the voltage by the "+" and "-"button. 5. Main display interface, All transition mode interfaces, After transition and stay at the interface When enter and shows automatic jump into main display interface. 6.Simple assembly, lightweight. Easy to use and carry.Tattoo Power Supply factory website:http://www.skytattool.com/power-supply/tattoo-power-supply/