Technical Features for Braun 310S MicroComb technology Triple Action Free Float System SensoFoil Middle trimmer Rubber Grip 100% waterproof Wet Dry Use Ni-MH Battery 45 Min Shaving Time Worldwide Voltage Adjustment MicroComb It features two rows of fine, evenly spaced grooves that surround an independently moving middle trimmer. This catches and feeds more hair with every stroke, which gives you a faster shave. Triple Action FreeFloat System Three independently moving cutting elements adapt to every facial contour and guarantee a smooth shaving experience. SensoFoil Specially designed to deliver an efficient close shave and a gentle skin experience. Middle Trimmer Easily cuts even longer and more difficult hair. 100% Waterproof The Braun Series 3 is 100% waterproof and can be submerged in up to 5 meter deep water. Which means it is fully washable and you can comfortably rinse it under running water for easy cleaning. Use Wet Dry You can use the Series 3 ProSkin with water, foam or gel for even better gliding and a smoother skin feeling. Plus you can even shave in the shower.. Automatic voltage adaptation Worldwide Voltage Adjustment. Works with 100V to 240V AC. F3-Flex Head.. Adapts to every facial contour for closeness and comfort.