DIY Spot Welder Nickel Sheet Portable Welding Rechargeable

Pulse time: six gears adjustable (1-6-1 gear cycle, 6 gears maximum)
Trigger delay: 0.8 seconds
Adapted charger: 5V, current greater than 1A
Instructions for use:
1. Long press for 3 seconds, the buzzer will sound once, turn on/off
2. Short press the button, the buzzer will sound once, and the gears will be changed. Each time you press it, you will increase by one gear, 1-6-1 cycle, and the 6th gear has the strongest welding strength. Observe the light after pressing the key. The light flashes several times in several gears. The gear will be stored automatically when it is turned off, and the gear will be stored by default next time it is turned on.
3. After the welding pen is pressed, the buzzer will sound and wait for about 1 second to trigger welding.
4. When charging, the button light will remind in the form of breathing light, and the light will always be on when it is full. The welding function is not available when charging.
5. If it does not work after working for a period of time, it may be that the power is too low, causing the MCU to not work, the charging light does not turn on, and it does not turn on. At this time, it will be charged for half an hour and the voltage can be restored after the voltage rises.