Feature: 1. OLED color display, gear, voltage and power can be clearly displayed. 2. 110 gear soft and fine adjustment, wider adaptability, thick and thin steel strips can be welded. 3. Fast charging, 2-hour charging, 2.1a high current fast charging, compatible with all mobile phone charging heads,It can be used as a power bank. 4. Pure copper pen holder, imported welding needle, good conductivity and durability. 5. Solderable nickel mobile phone battery. Specification: Features: OLED color display, gear, voltage and power can be clearly displayed. 110 gear soft and fine adjustment, wider adaptability, thick and thin steel strips can be welded. Fast charging, 2-hour charging, 2.1a high current fast charging, compatible with all mobile phone charging heads,It can be used as a power bank. Pure copper pen holder, imported welding needle, good conductivity and durability. Solderable nickel mobile phone battery. Specification: Material: aluminum alloy Battery: lithium battery Welding capacity: 0.15mm nickel-plated steel strip Power: 5V/2.4A Battery capacity: 5000mah Weight: 519g Package size:27.5x10.5x5.5cm Packing List: 1xWelding Machine 1xUSB 2xWelding pen 1 roll nickel-plated steel strip Package List: 1xWelding Machine 1xUSB 2xWelding pen 1 roll nickel-plated steel strip