Wireless 510 Gauge Thread Welder Rechargeable Portable Electric Soldering Iron Product Features: Advanced materials: This set of pen shaped button batteries is made of advanced materials, which are durable and practical. Lightweight and compact: This toolkit has a lightweight and compact structure, making it very convenient to use. Fine workmanship: The charger kit is finely crafted to ensure efficient and convenient charging. Simple structure: The charging kit has a simple structure and does not require complex operations. USB cable connection: The battery pole is connected using a USB cable, which is convenient and practical. Parameters: Color: Black，Pink，Green，Red, Orange Materials: Zinc alloy, stainless steel. Product Size:102*13mm Battery capacity: 650MAH Working voltage: 2.7-3.4-4.2V The packaging includes: 1x pen shaped welder 1x USB charging cable  NOTICE:  If it is fully charged but does not work, you only need to quickly press it 5 times to open it.  If you have any questions, please feel free to contact us at any time.