Interchangeable Tip: Our thread cutter is equipped with an ultra-fine tip and it reach 800℃/1472℉ in 1-2 seconds for clean cuts across materials like polyester threads and leather cords. Paired with a heat- metal tip cap for safe storage. USB Cordless Thread Zapper: Powered by a 1100mAh lithium battery with USB-C fast charging, this cordless tool delivers 30 minutes of continuous precise operation on a single charge (full recharge in 2.5 hours). Say goodbye to annoying tangled cords and battery . Easy Operation: Thread burner tool kit activates with a simple 5-click to turn on/off. One simple button pressure to activate heating with immediate cooling upon release - ideal for controlled work like leather sewing and embroidery thread sealing. Portable and Safe: With small and compact package the cautery pen (6.5x0.55Inch) is so portable to carry in bag or stored in shelf. In addition, it activate 5-minute auto-sleep mode during continuous heating to prevent overheating so as to extend component lifespan and safe operation., Manufacturer: Akfldms