Mast Shuttle pen machine is carved by aircraft aluminium, custom Mast coreless motor 12000rpm, Low noise,strong power, super stable,Pretty quiet - low noise, no hot for long time working. This tattoo pen have 4.0mm stroke length, perfect for fine or bold lines, realistic color, traditional style, It's your all-in-one machine if you're an artist that does such work. RCA Cord connection.Continious operation.Smooth, soft, and quiet operation,Ideal healing results. The machine has a working voltage of 6V¨C9V. Pebble modeling, Custom Mast coreless motor 12V/12000rpm.The Mast Shuttle tattoo machine is compatible with all cartridge needles types. Package include one rotary tattoo machine and RCA cord.Specifications: Weight: 125g Machine Diamater: 35mm Machine Length: 86mm Motor: 12V/12000Rpm Needle Stroke: 4mm Suggest Voltage: 6-9V