Features: Made of premium aluminum alloy material, with anodic oxidation surface, abrasion resistant, fire-proof and durable in use. Our spot welder has over-temperature protection functions, it will automatically shut down when the temperature exceeds 60, which can guarantee safety use. The integrated welding pen has good conductivity, low contact resistancequick disassembly and easy wiring. Built-in high rate power battery, with fine charge and discharge performance, more stable. The output power is adjustable in 6 levels, and the welding is more precise. Simple to operate and provides very good spot welds. Specifications: Material: aluminum alloy 400mm long spot welding pen Color: shown as pictures Battery capacity: 6500mAh Output voltage: 4.2V ( Max ) Output current: 650A ( MAX ) Charging interface: Type-C Package weight: 668g Package size: 24.5 * 15 * 5cm Package List: 1 Spot Weld Soldering Kit