The DRAGONHAWK Mast pen rotary machine is much quieter and vibrates less than conventional tattoo devices. But it still has high puncturing power and frequency. Continuous operation, Low noise, Long-lasting stability, Light weight, 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. 9000 R/Minute, strong and powerful, available for shading and lining. Stable operation between 6-9V with DC cord connection. The DRAGONHAWK Pen is designed to give you the closest feel to an actual pen that you can get with a tattoo machine.Specifications: Weight: 123g Machine Size: 25mm*119mm Stroke Length: 3.5mm Needle Protrusion: 0-4.5mm Speed: 8V-8000Rpm Operating voltage: 7-9 V