New Tattoo Mini Wireless Power For Tattoo Rotary Machine Pen RCA Connection Tattoo Power Supply  Product parameters Material : Aluminum Alloy Output voltage : 6 7 8 9 11v Input voltage : DC5V / 1A Charge mode : type-c quick charge Connection : RCA Battery capacity : 1200mah Size : 27.5 * 62.8mm N . W : 57g G . W : 122g Protective Mechanism 1. Output short circuit protection 2. Dual input charging protection ( batteries and the control board both equipped with shutdownovershoot and over discharge protection ) 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 capacity is 1200mAh,3.5 hours to be full charged at above 1A charger,about 8 hours working at 8V   7. This pack is only for rotary machines but coil machine.  8. Don't use this pack while charging. Problem solution :Please connect with charger to activate when shut down