Weight: 135g( 0.30lbs). Stroke: 3.5mm. 0 – 4.5mm adjustable needle depth. RCA connection Compatible with all cartridge needles Dragonhawk rotary pen tattoo machine Japan motor, continuous operation, Low noise, Long-lasting stability, Light weight, unibody. Operating voltage: 5-15 V DC, Rpm range Stitches / Sec: 8V-8000rpm / min 8-800 / sec This machine features a powerful motor and an advanced gear system that guarantees reliable, quiet operation without any vibration The DRAGONHAWK Pen is designed to give you the closest feel to an actual pen that you can get with a tattoo machine. The Atom is incredibly lightweight at 135g with a high quality anodized aluminum frame. It is also extremely versatile with an adjustable needle depth from 0 to 4.5mm and 3.5mm stroke.