MinderRC DH30 Spot Welder Adjustable 30 Gears OLED Screen 5000mAh Lipo Include For Max 0.2mm Nickel Strip Portable Spot WeldingPlease full charging before using The two needles of the spot welding pen cannot be touched together, which will cause a short circuit and burn the machine.The DD3.0 is new to the market, the response to the .0 was not very good, so a mini spot welder that can weld 0.1-0.15mm nickel pieces in up to 30(MAX) positions was introduced. It has a 0.91inch screen, which makes it very easy to visualise the power level etc. It is very convenient and quickSpot Welding Power Setting:Start with the first gear and increase the power slowly until it can be welded. Do not increase the power if it can be welded. Avoid MOS bombs. The black solder joints indicate that the power is too high.When welding, press down the soldering pin lightly, and the nickel sheet and the battery can be bonded together. The harder you press, the less solid the welding will be. It will automatically trigger after pressing down for one second.Adapter Selection Requirements:The adapter requires 5V, 2A or more. If you don't have such adapter, we recommend buying it at our store together to better charge the spot welder.USB Output Port Description:Because the internal circuit of the spot welding machine is different, there may be some compatibility issues with the phone charging, so the phone cannot be charged temporarily,if you need charger phone,you can Short-circuit 2 and 3 of the usb output port.And for android cellphone,mobile phone charging protocols are different, and currently cannot all support fast charging protocols.Screen: 0.91 Inch OLEDBattery Capacity: 5500mAhWelding Output: 4.2V MAX 650AUSB Output:5V MAX 2.4ACharging Port: Type-CProduct Size: 103x83x29mmcolor:GreyMaterial:MetalPackage Contents:1 x spot welder1 x butt welding pen1 x cable1 x nickel tapeOnly the above package content, other products are not included.Note: Light 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.