Colors: Green, Black, Red,Blue, Purple Stroke: 3.5mm Motor: Carbon Brush Motor(3.5W) Speed: 0-9000 rpm Battery capacity: 2200mAh Charging voltage: Charging Voltage Working voltage: 4.5-12V DC Grip: Removable, sterilizable, more hygienic Usage time: 4-8 Hours（According to the tattoo area, the voltage used is different, and the use time will also be different） Pen size: 144*34mm
