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: 172g Material: Space Alloy Stroke Length: 3.5mm Battery: 1500mAh Working Voltage: 5-12V Speed: 12V 10500Rpm