[Portable Cordless Design]: premium cordless hair straightening brush is specially designed for facial hair and beard. USB can be charged. For faster and smoother charging, please use a 5V, 2A adapter. Small and light, easy to carry. It will be perfect for traveling.[Advanced Ion Heating Technology]: The unique ion heating technology seals the hair scales, which can easily slide over facial hair, reduce combing and eliminate frizz, and quickly heat to 200C to keep the beard and hair looking healthy, natural and shiny. All day long.[Automatic Shutdown Protection]: Set different temperatures according to actual needs, and the real-time LCD screen displays from 80 C (184 F) to 200 C (392 F). The temperature lock ensures that the temperature will not suddenly rise and damage the hair.[High-efficiency Straightening Brush]: The beard straightening brush adopts unique ion heating technology to always maintain a constant heat level, providing the maximum straightening ability, and it can be quickly shaped in 3-5 minutes, so that the hair and beard are not knotted. Note: Due to the rapid increase in temperature, some black smoke and burnt smell will appear, which is normal.[Warranty And Service]: provides a 12-month warranty and friendly 24-hour customer service. When the item has any problem, please feel free to let us know, and we will give you the most timely service.