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 BagDH30 3 mean with 3pcs 0.12mm x 8mm x 10m Steel Strip;DH30 EU 3 mean with a EU power adapter and 3pcs 0.12mm x 8mm x 10m Steel Strip;DH30 EU Bag 3 mean with a EU power adapter, a Storage Bag,3pcs 0.12mm x 8mm x 10m Steel Strip;DH30 Spot WelderScreen: 0.91 Inch OLEDMaterial: Metal CaseBattery Capacity: 5000mAhWelding Output: 4.2V MAX 650AUSB Output:5V MAX 2.4ACharging Port: Type-CProduct Weight: 302gProduct Size: 103x83x29mmColor: As ShownMaterial: metal+plasticStyle: A-1 x 0.12mm x 8mm x 2m Plated Steel BeltU Disk Firmware upgrade full charging using Spot Welding Power Setting: 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 sheet and the battery can be bonded . The harder you press, the less solid the welding will be. It will automatically trigger after pressing down for one second.Adapter Requirements:The adapter requires 5V, 2A or more. If you 't have such adapter, we recommend buying it at 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 Welder1 x Welding Pen1 x Type C Charging Cable1 x 0.12mm x 8mm x 2m Plated Steel BeltOnly 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.