1. Press and hold for 5 seconds to turn the soldering iron on or off, enabling quick heating and cooling. 2. Made of high-quality stainless steel, portable, easy to operate, convenient and practical. 3. Fast heating with selectable high, medium, and low temperature settings. 4. Ideal for handicrafts, thread cutting/wiring/finishing, wax melting and carving, jewelry making, woodboard hot stamping, and similar applications. 5. Features auto sleep mode after 10 minutes of inactivity. Product Name: USB Hot Wire Pen (with Cover) Suggested charging voltage: 5V Operating voltage: 2.7V-3.4V-4.2V (adjustable) Battery capacity: 650mAh Charging time: 60 minutes Usage time: 30 minutes Working temperature: 330°C-450°C Auto sleep: 10 minutes Applicable scenarios: Handicrafts, wire cutting/connection/finishing, wax melting and carving, bead jewelry, woodboard hot stamping, etc. Note: Product appearance, color, and printed text may vary slightly between batches, but this does not affect functionality. Color: Black Material: Stainless steel Package Contents: 1 x USB Hot Wire Pen Kit Contents limited to items listed above; other accessories not included. Note: Lighting reflections and display differences may cause slight variations in color representation. Measurement error allowance: +/- 1-3 cm.