6. Supports 5-15V voltage input, and the default copper ear power interface is convenient for use with lead-acid batteries, high-rate lithium battery packs, capacitors, etc. 7. When using three strings of 2.7v3000F supercapacitors for power supply, a maximum of 0.2mm aluminum-nickel composite strip can be spot welded, and a maximum of 0.1mm nickel-plated superimposed 0.2mm copper strip can be spot welded to a steel-cased battery, such as 18650. 21700 battery cells, please note that the internal resistance of a single capacitor cannot be 0.25 milliohms! Function: ①Pulse 1: 1-20 milliseconds adjustable ②Interval: 0-99 milliseconds adjustable ③Pulse 2:0-20 milliseconds adjustable ④Automatic spot welding: adjustable from 0.1 to 5 seconds; when automatically adjusted to 0.00 seconds, it is manual mode ⑤Input voltage: 5-15v ⑥Buzzer sound on/off ⑦Historical spot welding records ⑧Screen rotation angle 0-180° adjustable ⑨Automatic shutdown function, adjustable from 5 to 60 minutes ⑩The system supports switching between Chinese and English parameter: Suitable for nickel sheet specifications: 0.1-0.3mm Gear: double pulse adjustable Welding pen specifications: 8AWG silicone soft wire Colour:random color , don't accept the specified color Material:Metal + PC Package Contents: 1 x Spot Welder Control Board 1 pair x spot welding pens 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. 5. Use a rotatable encoder for operation, which is simple and controllable. 2. The spot welding machine welds firmly, does not burst the pipe, is stable and reliable, and . 3. The welding equipment is made of metal and PC materials, which are of high quality and . 4. Use a large color high-definition screen with clear display. 1. This product is a double-pulse adjustable spot welding machine using high-power relay