The dual-purpose soldering iron desoldering is very suitable for professionals. Safe and reliable, with strong suction. It can be operated with one hand and is easy to use. After connecting the back cover power supply for a few minutes, you can hear a beep and start it. After the soldering tool is completely cooled, you can remove the black decorative ring, press the button, and then rotate the seat ring from the left, and finally remove the tin. Scope of application: home appliance repair, electronic equipment repair, school teaching, factory production line, etc. It can also be used as an ordinary soldering iron. Lithium battery: 3.7V 1800 mAh Power supply device: 5V Charging limit current 1.6A (full charge takes 1.5 to 2 hours) When the charging voltage is higher than 6V, charging stop and the power indicator light flashes red. When charging, the corresponding indicator light flashes, and when the battery is fully , the three indicator lights are always on. When the battery voltage is lower than 3V, the battery be with a small current and the red indicator light flashes. Colour:As Shown Material:Plastic+Metal Package Contents: 1 * Welding pen 1 * Charging USB cable 1 * Solder wire 1 * Stand Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.