Usage Tips:[1]The-2 features a backlit digital display, touchscreen, and colorful LEDs that indicate current voltage range. [2]Adjust voltage between 3-16 volts by 0.1v increments with precision regulated voltage output so you can fine-tune your machine with unparalleled accuracy. [3]Dual output so artists can seamlessly switch between liner and shader tattoo machines. External foot pedals can only be used when running one machine. [4]Smart Pedal technology allows artists to pick between two foot pedal modes: momentary (conventional) or maintained (toggle on/off). Foot pedals are not required for use. [5]Built to last using CNC-machined anodized aluminum and parent polycarbonate. Anti-slip base with built in magnets for easy mounting. Advanced digital microprocessor regulates voltage output with unparalleled accuracy. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC100-240V Colour:black/silver Material:aluminum Size: 3.5 x 7.5 x 7.5cm Package Contents: 1 x Tattoo Power Supply 1 x Power adapter 1 x power cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.