Dragonhawk Atom cartridge tattoo machine precision DC motor, continuous operation, Low noise, Long-lasting stability, Lightweight, unibody. Compatible with all cartridge needles. this tattoo pen offers you a better user experience. Rotate the tattoo machine grip to adjust the needle's depth. 9000 R/Minute, strong and powerful, available for shading and lining. Stable operation between 6-9V with DC cord connection. Random color will be shipped if the one you choose is sold out.