Ambition wireless machine - Tattooing has never been simple, more intuitive and more free Material: Space aluminum alloy Needle Stroke: 3.5mm Motor: Custom Coreless Motor. Ambition tattoo pen coreless motor is good with lip shape, eyebrow, eyeliner and small tattoo Motor Speed: 8V - 9000RPM; Output Voltage : 5V-9V; One Battery Capacity: 900mAh; Charging time: About1.5 hours, the voltage stable state can last for more than 4-5 hours LED display content: output voltage range + battery usage Instructions for use: - Power ON/OFF: Long press "O" key for 3 seconds - Adjust output voltage: Press the "+" or"-" key to adjust output voltage. The voltage can be adjusted through button (+) and (-) respectively with the voltage of 0.5V on each press. Power: The LED display will show the remaining power, and the full power will display 4 divisions. Fast charging through the matching fast-charging type-C data cable can usually be fully charged in 2 hours. Features: The tattoo machine battery is small and delicate, with finely carved and trimmed edges, the appearance is shiny and bright, and the hand feels fine and smooth. Working great for tattoo body and eyebrows eyeliner lip, which can meet the needs of various patterns. High quality coreless motor, stable power output, low sound and long service life. Anti-slip design of hand pattern, anti-slip and resistant to grip, long-term use, not tired, sweaty and not slipper. Compatible with major brands tattoo needle cartridges