I-shaped design provides better precision and control for trimming delicate areas 3mm to 12mm length setting on the comb adjustment dial lets you create different styles such as a clean fade or a precise groom Rounded edge blades slice away thick hair in sensitive areas with less chance of irritating the skin Supports both wet and dry usage for trimming at the sink or while in the shower Waterproof construction makes cleanup fast and easy when you are on the go Built-in rechargeable Ni-MH battery provides up to 50 minutes of cordless usage after a full charge of 1 hour Compatible with the WER9500 replacement blade