Philips S3144/00 Shaver Series 3000 Wet & Dry Electric Rotary Shaver – 5D Flex Heads & PowerCut BladesModel Philips S3144 00 (Shaver Series 3000) Shaving System PowerCut rotary blade system Blade Technology 27 self sharpening blades for consistent cutting performance Cutting Performance Up to 55,000 cutting actions per minute Flex Heads 5D Pivot & Flex heads for full contour adaptation Wet & Dry Use Yes dry shave or wet shave with gel foam Power System Cordless only Battery Type Lithium ion rechargeable battery Run Time Up to 60 minutes (approx. 20