About Combo: DH30 Standard mean Standard packing; DH30 EU mean with a EU Power Adapter; DH30 EU Bag mean with a EU Power Adapter and a Storage Bag DH30 3 Nickel mean with 3pcs 0.12mm x 8mm x 10m Nickel Steel Strip; DH30 EU 3 Nickel mean with a EU power adapter and 3pcs 0.12mm x 8mm x 10m Nickel Steel Strip; DH30 EU Bag 3 Nickel mean with a EU power adapter, a Storage Bag,3pcs 0.12mm x 8mm x 10m Nickel Steel Strip; DH30 Spot Welder Screen: 0.91 Inch OLED Material: Metal Case Battery Capacity: 5000mAh Welding Output: 4.2V MAX 650A USB Output:5V MAX 2.4A Charging Port: Type-C Product Weight: 302g Product Size: 103x83x29mm Color: As Shown Material: metal+plastic Style: A-1 x 0.12mm x 8mm x 2m Nickel Plated Steel Belt U Disk Firmware upgrade Please full charging before using! Spot Welding Power Setting: Start with the and increase the power slowly until it can be welded. Do not increase the power if it can be welded. Avoid MOS . 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 't have such adapter, we recommend buying it at our store together to better charge the spot welder. We not suggest use PD charger,because some PD charger and wire can not output a 5V voltage! Package Contents: 1 x Mini Spot Welder 1 x Welding Pen 1 x Type C Charging Cable 1 x 0.12mm x 8mm x 2m Nickel Plated Steel Belt 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.