The extreme x3 machine use 1500mah high capacity battery, can work for 4-6 hours. Custom. Dragonhawk coreless motor increased torque with less voltage when tattooing. Compatible with all standard cartridges. This machine running smoother, quieter operation at a lower voltage without stalling. Yype-c interface, convenient, comfortable and durable.Specifications:weight: 172gmaterial: space alloystroke length: 3.5Mmbattery: 1500mahworking voltage: 5-12vspeed: 12v 10500rpm