Features: 1. With pneumatic spot welding function 2. Charging current: 0-20a 3. Charging voltage: 2.3-4.2v 4. Maximum charging power: 120W 5. Input : 12-24V (it is recommended to use a voltage above 16V, and the DC socket can withstand a maximum current of 6.5A) 1.Support switching between Chinese and English 2 Support 24V solenoid valve 3. Built in buzzer, which can be turned on or off 4. Automatic welding function 5. The withstand voltage of a single capacitor is adjustable 6. Continuous spot welding 7. manual welding delay trigger is adjustable 8.Color: Red 9.Material: PCB+ electronic components Package Contents: 1 x spot welder control board 1 accessories 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.