The slim sonic toothbrush brings a whole new dimension to sonic toothbrushes, merging fashion, ease of use, and best of all its slim size make it a perfect on-the-go companion. It's convenient and truly portable. Fashion meets functions with a great big healthy smile. Designed for the smart, on the go, fashion forward woman who appreciates value and products that deliver what they promise. Slim is the first portable sonic toothbrush with a snap on vented mascara style cap. It stays clean and dry, making it perfect to carry in your purse, cosmetic case, backpack or briefcase. Simply press the button and 22,000 brush strokes per minute leave you with a clean, beautiful and healthy smile. Slim sonic comes styled in an array of fashionable finishes, so they can be discreetly displayed in style. Brush heads are considered medium bristles and measure 3/4" long. Includes 2 brush heads and is ready to use right out of the package. (additional replacement brush heads are available)