Product: Get this 360 Degree Sonic Whitening U-shaped Electric Toothbrush today! Frequency: 5000-15000 times /minute. Ideal: For cleaning those unreachable parts of your teeth, thanks to it's U-shaped design. Additional: This mouthpiece is waterproof. Perfect: For improving your dental hygiene. Features: Soft bristles made from food grade silicone. 360 Degree Sonic Whitening U-Shaped Electric Toothbrush | Living Social