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.Specifications: Weight: 156g Diameter: 28mm Length: 120mm Stroke: 3.5mm Working Voltage: 6-9V Speed: 9V/10000Rpm