High-quality anodized aluminum housing Roulette drive structure design without any spring or magnet Hollow cup non-brush motor Stroke: 3.7mm, 0-3.5 mm adjustable needle depth LED Screen displays voltage, battery capacity, and working time Physical buttons, Adjust the voltage as 0.1V 1600 mAh,  4-12v Voltage Adjustable, Run for 4-6 hours, takes 2 hours to charge USB Tape Charge, takes 2 hours to charge full Compatible with most of the cartridge needles in the market Diameter: 31 mm, Length: 118 cm,  Net Weight: 175g includes the battery One year warranty