Features: The USB soldering iron is of internal heating thermostat, aluminum-free soldering tin, anti-oxidation, fast heating, easy installation. High / middle / low selection modes, tin melt for time is less than 15 seconds, small tip makes the electric solder for ideal for SMD work and other small welding jobs. Press and hold the switch for over 2 seconds to turn on the soldering Iron, it can heat up and cool down quickly, with auto sleep function. The soldering Iron is small and exquisite, made of high quality stainless steel, not easy to rust and aging, strong and durable Multiple power supply methods, USB with charger, with computer, with mobile power, the digital solder iron is convenient and practical. Specifications: Input Voltage: 5 V Power: 8 for W Temperature Range: 330-450 Tin Melting for Time