I have short hair, and was looking for a blower brush ie with both the large and small rotary, which is the case with this appareil.il are 2 power and cold air button, it is easy to use, the brush in both directions can be rotated, the brush is more flexible so do not break cheveux.petit flat hot air button 1 is placed after the 2 (up), not quite understand the interest in Apart from that it is a very nice device.