Soku Tattoo Wireless Pen Machine with 2 Replacement Batteries- 4.0 mm stroke

High-quality anodized aluminum housing Roulette drive structure design without any spring or magnet Hollow cup non-brush motor Stroke: 4.0 mm, 0-5.0 mm adjustable needle depth Compatible with most of the cartridge needles in the market Diameter: 30 mm LED Screen displays voltage, battery capacity, and working timing function 2 lithium batteries, a charger with cable included Lithium battery: 1700 mAh, work over 3 hours Recharge: 2.5 Hours with USB Tap C Liner and Shader function switch Physical button to avoid accidental touch during the working The display is of low battery consumption and high performance   How to work? Press 3 seconds: On / Off Press 2 times: Liner/ Shader Press 1 time: Pause Voltage Resolution: -0.1 Volts