Product: Spot Welding Machine PCB Circuit Board Working voltage: 6.5V-16V Working current: Less than 20mA Standby power consumption: Less than 0.5mA Recommended temperature: -10 - 60 Size: 10.7 x 5.3cm Welding value current: 180A MAX Intelligent sleep: 8 minutes of automatic sleep Welding mode: default automatic welding mode Welding nickel sheet thickness: 0.1-0.3mm (related to battery discharge energy) (1 smart motherboard + 2 spot welding pens + 4 screws + 4 nuts + 2 connecting wires + 1 2-meter nickel sheet + 2 heat shrink tubes) It's DIY kits, needs to finish by yourself. Color: Green Material: PCB Package Contents: 1 set * Spot Welding Machine Circuit Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.