Portable Spot Welding Machine with Quick Release Pen USB Charging Home Low Contact Resistance DIY Sp

Portable spot welding machine with quick release soldering pen.The integrated soldering pen uses gold-plated terminals, which have good conductivity and low contact resistance.It adopts micro-USB charging interface for easy charging.Built-in high-speed battery 2 has excellent charging and discharging performance.Fine workmanship and good performance.Easy to use. Expected to be long.Output voltage: 4.2V maxOutput current: maximum 639AInstructions for use:1. Please shorten it by 3 seconds. When buzzer sounds, it turns on\/off.2. Short press button. If buzzer sounds, it is shift position. Click once to add 1 level. 1-9 cycles, the 9th gear is strongest welding strength.3. After placing soldering pen, the buzzer will sound. Wait about 0.5 seconds to trigger welding.4. When charging, the power indicator flashes. When all four indicator lights are on, it indicates that it is fully . It can be welded while charging.colour:BlackMaterial:metalsize:105 x 83.2 x 28.8mmPackage Contents:1 x spot welderOnly above package content, other products are not included.Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +\/- 1-3cm.