This is the whitening toothbrush that was proven in lab testing to reduce unsightly tooth stains in only two weeks. An independent university study found the brush’s sonic waves buffed away surface stains and significantly improved discoloration after only two weeks of twice daily use. Its quiet vibrations whir back and forth 31,000 times per minute, safely scouring tooth enamel to eliminate residue from coffee, wine, and other staining drinks and foods. Three different shapes of bristles help remove plaque between teeth and below the gumline, while a “soft” mode works gently on sensitive areas and the tongue. A built-in timer prevents overbrushing. Provides up to 45 brushing sessions on a full charge with the included AC adapter. Comes with travel case. 8 1/3" L x 1" W x 1" D. (3 oz.)