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