【200 Million Negative Ions】: The hair dryer brush with over 20000,0000/cm³ negative ions, hair straightener brush helps prevent static electricity and reduces frizz,get lustrous, smooth and frizz-free in minutes. 【Ceramic Coating & 2 Kinds Comb Teeth】: Ceramic coated board hair comb with two types of material comb teeth, 30S fast heating and constant temperature hair care, while helping to improve hair knots and dryness. 【Three Temp Setting】: There are three temperature control settings with a maximum temperature of 120℃, 30s quick heating meet various needs such as blow drying, straightening, and smoothing hair. 【Removable Filter】: The hair dryer brush adopting double filter design to prevent hair from being sucked in during use. The outer filter is detachable for easy cleaning the dust and impurities inhaled in the filter.