1. continuously for 5 seconds to shut down, turn on the soldering iron, and quickly heat up and cool down. 2. High quality stainless steel, and easy to carry, easy to operate, convenient and practical. 3. Fast heating, high/medium/low selection mode. 4. It is very suitable for hand weaving, thread breaking/wiring/finishing, wax melting and carving, jewelry bead, wooden board hot stamping, etc. 5. Auto sleep, auto sleep for 10 minutes. Product Name: USB Hot Wire Pen (with Cover) Suggested charging voltage: 5V Voltage: 2.7V-3.4V-4.2V (adjustable) Battery capacity: 650mAH Charging time: 60 minutes Duration of use: 30 minutes Working temperature: 330℃-450 ℃ Automatic : 10 minutes Applicable scenarios: Hand woven special, wire breakage/connection/finishing, wax melting and carving, jewelry bead, wooden board hot stamping, etc Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Material:Stainless steel Package Contents: 1 x USB hot wire pen kit 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.