About this item 【Battery Power Supply】Battery Capacity is 2100mAh. Can support long-term tattoo work, output stable. 8V output voltage can work for 8 hours, only need 1.5-2 hours to fully charge. 【Machine Motor】Wormhole wireless tattoo pen machine built-in Brushless Motor, 10V - 10000RPM. More powerful, low skin loss, fast coloring, no hot for long time working. 【Features】Due to the strong motor and the special structure of the tattoo pen. Can bring powerful strength to help users better complete the liner work. 【Widely Applications】The pen machine is compatible with all cartridge needles types, direct ​derive system make tattoo machine get stronger and better for liner and shader. 【Other Advantage】fast charge with Type-c jack,overcharge protection, short circuit protection, temperature control, and more. Suitable weight and comfortable grip.