The Noir Rotary Pen have a customized motor, continuous operation, Low noise, Long-lasting stability, 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 deepth. 10000 R/9V, strong and powerful, available for shading and lining. Stable operation between 6-9V with RCA cord connection.