Hu1m Colgate Smart Toothbrush Kit, Ultrasonic Toothbrush with Travel Case Blue. The hum by Colgate Smart Battery Operated Toothbrush with blue tooth connectivity guides you to brush better by tracking the frequency, duration, and coverage of your individual brushing style to help you target spots that need extra love. With a brush that knows you and an app that shows you, hum sonic toothbrush makes seriously good oral care something to smile about with fun activities and challenges that help you improve you?re brushing while you earn points toward rewards. Go beyond the guesswork with our soft bristle toothbrush!