specification: Item Type: Tattoo Power Supply_x000D_Material: Aluminum alloy_x000D_Product size: Approx. 75 x 35 x 35mm / 3.0 x 1.4 x 1.4in_x000D_Battery: 1800mAh lithium battery (built in)_x000D_Output voltage: 5-12V adjustable, adjustment accuracy 1V_x000D_Power interface: DC interface_x000D_Charging port: Micro USB_x000D_Charging voltage: DC5V /1A_x000D_Charging time: 1.5-2 hours_x000D_Battery life:_x000D_Use time: Under the normal 4 gears 8V voltage, the voltage can be used for about 6 hours in a stable state._x000D__x000D__x000D_How to Use_x000D__x000D_LCD display content: Output voltage gear, battery usage_x000D_Function:_x000D_1. Self contained memory function: the number of power supply voltage when the power supply is started is the number of voltage when it was last turned off;_x000D_2. Pause function: Press the 0 key to pause, press it again to start working;_x000D_3. Universal charging port: Most of for Android USB data cables on the market can be used universally; the device is a tattoo power supply, with input port, output port, built in lithium battery, external switch button, voltage adjustment button, pause button , LCD screen, the specific functions are as follows:_x000D_1. Power on: Press and hold the middle 0 key for 5 seconds to power on, and then press and hold for 5 seconds to power off;_x000D_2. Pause: during normal work, short press the 0 key to pause the work, and press it again to resume work;_x000D_3. Adjust the voltage: press the + or - key to adjust the gear, the corresponding gears 1-8 represent 5-12V respectively;_x000D_4. Battery display: It is displayed on the LCD screen, it is full of 4 grids of electricity, and it needs to be charged when the remaining 1 grid of electricity;_x000D_5. Charging: power supply. There is an external USB charging interface on it, which can be charged with the wearing USB data cable or the mobile phone for Android data cable. There is overload protection, and it will be powered off when fully charged. Features: 11V: 1?8 gears represent 5?12V adjustable voltage respectively, and the adjustment voltage accuracy is 1V, which can meet the speed requirements of tattoo artists operating different parts. 21800mAh Battery: Our tattoo power supply has a built in 1800mAh large capacity battery. Under the normal 4 speed 8V voltage, the voltage can be used for about 6 hours in a stable state. 3Convenience: Get rid of the shackles of traditional power supplies that require multiple accessories to work, omit power cords, tattoo clip cord, and pedals, making the work of tattoo artists more convenient. 4LCD Digital Screen: Make the voltage output display more accurate, light and compact, make the power supply and your tattoo pen easy to use and operate freely. 5DC Interface: Suitable for most tattoo machines with DC interface, the mouth is tightly closed and not easy to fall off, which is very convenient for charging. PackageList: 1 xTattooPowerSupply 1 x Charging Cable 1 x Manual