The Hair straightener electric comb is a Cordless hair smoothing brush with USB Charging, which is suitable for all hair types and is perfect for travel, date or at home. The ceramic coated Iron comb adopts the upgraded ceramic heating technology, which provides quick heating and styling. The new hair straightener comes with a 4000mAh Lithium built-in rechargeable battery, a full-charging time of 4 hours to offer around 45 minutes of continuous operation.