<b>Mummy Wireless Rotary Battery Tattoo Pen Machine</b> <br>Tattoo Rotary Machine Frame:aircraft Aluminum <br>Start Voltage:5V <br>Operating Voltage:5.-12V <br>Rpm Range Stitches/Sec:10800rpm <br>Needle Protrusion:0-4.5 mm <br>Stroke Length:3.5mm <br>Dimensions:Diameter x Length:32x142mm <br>Net Weight:197g