USB Soldering Kit: Adjustable temperature range: Press and hold the switch key for 2 seconds to start, the green index lamp temperature is 300-350 °C; Switch with one press, the blue index lamp temperature is 350-400 °C; Switch with one press, the red index lamp temperature is: 400-450 °C. The soldering kit is not a battery soldering iron. 【Portable】 Small and exquisite, light and easy to carry, easy and convenient to use, safe to use, reasonable size, suitable for home use and take out. 【Material】 Made of stainless steel, not easy to rust, not easy to age, strong and durable. 【Quality】 The soldering irons were built with quality in mind. Using intelligent design, intelligent heating element and comfortable grip. Wide application: very suitable for electronic work in the classroom, home and office and circuit design, jewelry, wood, crafts. It is the best choice for DIY enthusiasts. 【This product is not a battery soldering iron】