Fitment:This Tattoo Power Supply is suitable for many different kinds of eletric tatto pen which is used for tattoos, with mini wireless settings, easy to carry.Specifications:Item Type: Tattoo Power SupplyColor: Silver/Black/RedMaterial: Aluminum AlloyOutput Voltage: 6/7/8/9/11VInput Voltage: DC 5V/1ACharging Method: type-cConnection Method: plugBattery Capacity: 1200mASize: 17.5x2.5cm/6.83x0.98(1cm=10mm=0.39inch)Measurement Details in the attached picture.Features:-100% brand new and high quality.- Small and compact design, it is easy to carry and storage.-Plug connection, mini size, easy to hold with one hand, no longer worry about stepping on the line.-Comes with USB cable, easy and convenient to charge.-This power bank provide 5 adjustable voltages:6V/7V/8V/9V/11V, to meet different needs.Protective Mechanism 1Output short circuit protection 2Dual input charging protection (batteries and the control board both equipped with shutdownovershoot and over discharge protection)Instruction Manual:1Press and hold the power button 2 seconds to turn on/off.2Click the power button to adjust the voltage 6 7 8 9 11V.3Default booting at 10V start-up voltage in 0.2s,then load to the last memory working voltage.4It will shift to display the capacity of battery without working over 2s, and the indicator light is on the breathing state,the five indicators represent for 20%-100% of the power capacity,Click the button return to voltage display.5 The indicator light is blinking during charging, stop blinking with the overshoot protection working when full charged.6The pack capacity is 1200mAh,3.5 hours to be full charged at above 1A charger,about 8 hours working at 8V .7This pack is only for rotary machines but coil machine8Dont use this pack while charging.Package list:1x Tattoo Power Supply1x USB Cable