Features: High quality material: This lightweight, portable spot welder is made of solid, durable aluminum alloy housing with anodic oxidation surface treatment for wear resistance. Efficient welding: Equipped with 5 adjustable output power levels for precise welding control. LED indicator lights display the selected power level. Good performance: Welding pen features gold-plated terminals, long and flexible design for easy handling, quick installation, excellent conductivity, and consistent weld quality. Safe and reliable operation: Includes low voltage, overcurrent, and overcharge protection. Low battery alarm and automatic shutdown function when power is low. Power bank function: Built-in 5000mAh rechargeable battery supports fast charging of mobile devices via 5V 2.1A USB port. Specifications: Material: Aluminum alloy Color: Black Current: Max 650A Battery: 3.7V 5000mAh Item Size: 10.3 x 8.4 x 2.7 cm (4.06 x 3.31 x 1.06 in) Package Size: 10.3 x 8.4 x 2.7 cm (4.05 x 3.30 x 1.06 in) Package Weight: 400g (14.10 oz) Note: Spot welder set only. Other accessories shown in images are not included. Due to lighting or monitor settings, the actual product color may slightly vary from the images. Slight variations due to manual measurement may occur. Actual product takes precedence. Packing List: 1 x Spot Welder 2 x Welding Pen 1 x Charging Cable 1 x Nickel Sheet