XNET Vipera Adjustable Stroke Wireless Tattoo Machine Product Information Xnet Vipera Adjustable Stroke Tattoo Machine: Weight: 275g/0.61lb Length: 145mm/5.71inches Grip Part Diameter: 36mm/1.42inches 7 Strokes to Adjust: from 2.4mm to 4.2mm Motor: Coreless Motor Battery Capacity: 2400mAh (it need 2-3 hours to full charge, runs for 8-10 hours) Voltage Range: 4-12V More Details of Vipera Tattoo Machine: Adjustable Stroke Xnet tattoo machine gun has 7 stroke options from 2.4mm to 4.2mm which can be adjusted at will, suitable for all kinds of tattoos, perfect for lining, shading and color packing. You can change the strokes easily by turning the adjustment knob. Color Display Battery Xnet wireless tattoo machine has 2400mAh capacity color display battery, which displays the remaining power, timer, operating voltage, Herz. Also, you can adjust the working voltage by pressing the "+" "-" keys from 4V to 12V. Wirelss & Wired Mode The battery can be used for 8-10 hours when fully charged, which basically meets the needs of a tattoo artist for a day's work. If you forget to charge, there is a RCA adapter coming with the machine which can change to wired mode. Standard Interface Our Xnet Vipera tattoo machine pen uses a standard needle port and is suitable for most tattoo needles on the market. The coreless motor is powerful enough to push large rows of tattoo needles easily.