Features: 1.SELF CONTAINED THERMOSTAT: No need to adjust the temperature, internal configuration of the self contained thermostat, plug in the preheating 2 to 3 seconds can be used directly, directly use about 30 to 50 seconds. 2.ENERGY SAVING: Wax carving pen low power consumption, energy saving, high and low voltage are available, no limit, easy to use, safe and reliable. 3.BATTERY POWERED: Thread burning tool ironing wire carving without charging, directly into the AA battery can be used. 4.WIDE USE RANGE: Thread pen can be used in a wide range, all fabrics, fabrics and other flat materials can be used, suitable for DIY. 5.ALUMINUM ALLOY: The casing is made of aluminum alloy to prevent high temperature extension, more convenient to apply. specification:Item Type: Burning Thread Pen Material: Aluminum Alloy Voltage: 1.5V Battery Type: AA Batteries x 1 Lithium Ion (Battery Not Included) Product Use: Burning Polyester Thread (Not Suitable for Cotton and Linen Thread), Wood Board Stamping, Wax Mold Carving Size: Approx. 132 x 20mm / 5.2 x 0.8in PackageList:1 x BurningThreadPen(BatteryNot Included) Note1. The product is not equipped with batteries, you need to install AA batteries to use it. 2. The temperature is high in the heating state, do not touch or place on flammable objects to avoid danger.