4 in 1 Rotating Brush 1. Rotating boar bristle brush for easy styling. 2. Volume diffuser for natural waves. 3. Ergonomic double straightening head (20 teeth): Straightening from the roots that is 2 X as effective. 4. Boar bristle brush for finishing touches. 5. 2 temperatures + cool-shot to set the movement. 2 rotations to blow-dry hair under or out.