Easy and convenient to operate, wirele design, safe to use, reasonable size, suitable for both home use and take it out. 2. Two-way adjustment of the voltage knob, the temperature of the soldering can be adjusted. 3. There is a knob at the bottom to adjust the voltage, The adjustable range is 3.3V-4.8V. 4. A soldering interface can be connected with a soldering and a charging. 5. Copper alloy soldering , fast heat transfer, rapid temperature rise. 6. The power on has a prompt light, pre the power on, the indicator light is on. 7. During use, the on light flashes indicate the battery is low. Need to charge.