Watch the video to find out about the Braun Series 9 SyncroSonic Technology. Braun Series 9 - our most efficient and advanced shaver.* The intelligent SyncroSonic technology delivers 40,000 cross-cutting actions per minute for an outstandingly thorough shave and amazing skin comfort. The Series 9 shaver combines ergonomic Braun Design with highest Braun quality. SyncroSonic Technology – Quadruple action cutting system. Braun’s unique combination of pivoting shaver head and 4 individually floating cutting elements provides maximum facial adaptability and an ultimate close shave. Braun - Designed to make a difference. *Proven on 3 day beards.