Material: ABS, Product size: 236 * 35.5mm, Built-in: 5000mah, Heating temperature: 140-200 C, Rated power: 35 to 40W, Heating method: PTC heating. 4-speed temperature adjustment Cordless Hair Straightener Brush: The hot comb has a built-in battery (5000mAh) for long battery life and provides convenient USB Type-C charging. Small size, light weight, easy to carry. Use it anytime and anywhere, get rid of the trouble of wires. 4 temperature settings: Hair straightener brush comes with four heat settings: 200/392 for strong/thick hair; 180/356 for normal/textured hair; 160/320 for thin/fine hair; 140/284 for soft/fine hair. The included LED indicator allows you to To control and clearly understand the heating process. USB fast charging: our hair straightening brush is equipped with a 5000mAh battery, which can be quickly charged in 2 hours and can be used for 30-60 minutes after full charging. Cannot be used while charging. This offers you more convenient and efficient life services. Unique sandwich structure for healthy hair: the brush teeth adopt a sandwich structure. The inner teeth provide flexible heat to smooth hair depending on the hair type without overheating or damaging it. Cool side bristles cool hair, style it and prevent scalp and hand burns. Contoured handle allows for a secure and comfortable grip. Safe anti-scalding design: the handle of the smoothing brush is made of silicone material, which is safe and prevents scalding of the hand. Our wireless hot comb automatically shuts off every 20 minutes to prevent energy from being wasted or safety risks when not in use.