Brand New Mini Wireless Tattoo Battery Pack Power Supply For RCA Rotary Tattoo Machine Pen Name:Wireless Tattoo Powers Supply Full charging time:3hours Operating hours:6hours Charge interface:Type-c charging size:27.5*78mm Voltage:6 7 8 9 11v Material:Aluminium Input voltage:DC5V/1A Battery capacity:1200mAh Package include(Tattoo pen not include) 1x Wireless tattoo power 1x Cable Instruction Manual 1.Press and hold the power button 2 seconds to turn on/off. 2.Click the power button to adjust the voltage 6 7 8 9 11V. 3.Default booting at 10V start-up voltage in 0.2s,then load to the last memory working voltage. 4.It 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. 6.The pack cap