How to use BIFRC Pro DH30 Spot Welder 3.7V

This upgrade DH30 portable welding machine with a 0.91inch OLED display screen for you to read the data shown on the screen more clearly, and with 20 gears of power can be adjusted, it is a fine helper in your daily works, come on and have a try, it will not let you down. Features: Adopt a 0.91inch OLED display screen to let you see the data more clearly, give you a better using experience. The power has 20 gears for you to adjust, you can change it for your different needs. Simple operation: From the first gear and slowly increase the power until it can be welded, and don&increase the power if you can weld. Small in size and easy to carry, you can put it into your tool bags to carry it with you to anywhere you want to use it. Built-in large capacity lithium battery, you can recharge it when power is used up, do not need to change the battery often. Specifications: Brand: BIFRC Type: Spot Welder 3.7V Model: BIFRC Pro DH30 Material: Metal Color: Black Gears: 20 Screen: 0.91 inch OLED Battery: 1 * lithium battery, 5500mAh (included) Welding output: 4.2V max.650A Recharging port: type-c Item size: 103 * 83 * 29mm / 4.1 * 3.3 * 1.1in Item weight: 302g / 10.7ounce Package size: 143 * 107 * 48mm / 5.6 * 4.2 * 1.9in Package weight: 407g / 0.9lb Packing list: 1 * Welding Machine 1 * Pair Welding Pen 1 * USB Cable