1. The wireless tattoo power supply 3.7V Lithium Battery 2000mAh,RCA or DC Interface Available for Tattoo Pen Dedicated Power Supply,The Lithium battery specially designed for tattoo;

2. Three hours full charging working for 5-8hours; 

3. Lightweight: Just 66g, the weight distribution balance with the tattoo pen does not affect the tattooist's operation; 

4.  5V-12V voltage adjustment, 0.1V adjustable voltage can be increased or decreased to achieve fine control operation;

5. With output short circuit protection, overload protection, output current protection is set at 500mA;

6. press the Power button to turn ON/OFF,click the UP and Down switch to adjust the voltages;

7. To extend battery life, it is recommended that you charge and discharge the battery at least once a month.