1、MCU Control: This spot welder is powered by two farad capacitors (7V 3000F) and controlled by MCU, which supports automatic working mode, output power adjustment, delay setting, board temperature monitoring and high temperature alert. 2、120 Gear Adjusting: Our spot welder does not interfere with the circuit and has 120 gear output power adjusting, which can be easily adjusted by turning the button (0‑120 range). 3、0.1‑0.3mm Easy Welding: The battery spot welder can easily weld 0.1‑0.3mm thick nickel pieces, which can be done easily and efficiently with beautiful joints. Can be used for spot welding of batteries, hardware and electronic parts. 4、Safe to Use: The spot welder capacitor has energy harvesting pulse technology and low power consumption, allowing you to use the machine for up to 12 hours of efficient welding work without heating problems. For the first time use, you need to charge the machine for 20 minutes and the voltage is charged to 5V or more to finish spot welding. 5、Widely Used: The spot welder is mainly used for welding of battery nickel sheets, which can be used for spot welding of cylindrical lithium batteries such as 18650 or 21650, nickel metal hydride or nickel batteries, etc. It can also be used for welding of nickel plated steel sheets up to 0.3mm, pure nickel sheets up to 0.15mm, and stainless steel strips up to 0.35mm. 1 x Welding Machine1 x Power Adapter1 x Nickel Band2 x Welding Pen1 x File Item Type: Portable Spot WelderMaterial: Red Copper, NickelFarad Capacitor Model: 2.7V 3000F (2pcs 2.7V3000F In Series To 5.4V1500F)Maximum Output Voltage: 5.4VPower Adapter Input: 12V 4AMaximum Welded Nickel Thickness: 0.3mm( 0.012in)Operating Temperature Range: 0℃ To +75℃12V Power Input Port Specification: Approx. 5.5 x 2.1mm / 0.22 x 0.08in