DH Digital Tattoo Power Supply - Professional quality and built to last. - These units are powerful and operate trouble-free. - It offers your tattoo machine long-lasting power supply. With superior material, it has not only a stable performance, but also good aseismic capacity. Adopting precise breadboard and high-tech electronic components, it is fit for all kinds of tattoo machines. This device is an indispensable accessory for your tattooing. Powering your device starts from this superfine tattoo power supply machine! Package Includes: 1 Power Supply 1 Power Cord 1 set of holder parts Fully digital microprocessor control Precision regulated set point voltage 3-18VDC Plugin the power: Please use standard adapter connect to power supply through"DC/19" socket When plugged into the power supply, press"POWER BUTTON" for 3 seconds to switch on, or another 3 seconds to switch off. When switched on, touch "L/S BUTTON" switch to L/S model, when switch to L model, L be lighted, switch to model S will be lighted. This machine provides 6 preset voltage under mood of L/S, the factory settings: L1-5V/L2-6V/L3-7V/L4-8V/L5-9V/L6-9.5V S1-6V/S2-6.5V/S3-7.5V/S4-8.5V/S5-9.5V/S6-10V touch "PRESET BUTTON" swith successively to preset voltage, to adjust the preset voltage, touch "PRESET BUTTON" to adjust the voltage gears. Touch "VOLTS+" "VOLTS-" to adjust voltage, then press "PRESET BUTTON" for 3 seconds to save the preset voltage.