?Usage Tips?The music can be turned off/on by long-pressing the button for 3 seconds, but toothbrush should be in the off state. It is suggested to replace the brush head every 3 months for the sake of oral hygiene. Keep the toothbrush body dry while charging. Place the toothbrush in dry places and avoid exposure to sunlight. Dry the brush head after brushing. Continuous working time should be less than 10 minutes. ?Excellent Quality?For kids, we never take it lightly. Our toothbrush has obtained the certifications of CE, ROHS, IPX7. The Full-Body-Waterproof toothbrush can work perfectly even when taking shower. The vibration frequency is up to 31000 pulses with noise lower than 50 decibels. It is equipped with USB charging interface, magnetic suspension motor and 400mAh battery. It supports brushing for 20 days with 6 hours charging according to our internal test(2 times one day, 2 mins one time). ?Scientific & Smart Brushing?Triple brushing mode: clean mode, whitening mode and massage mode.One-Button operation, easy to use. 1st press to power on and clean mode, 2nd press to whitening mode, 3rd press to massage mode and the 4th press to power off. 2 mins scientific timing for each brushing with ending of each song in 30 secs to remind swithing the brushing zone. it stops automatically in 2 mins, Parents don't have to stay with their children to monitor their brushing. ?Musics & Replaceable Bristles?4 favorite songs with cartoon pattern and flashing light design, each brushing just like your kids are conducting a music concert. You will get 4 replaceable bristles for children 3-12 years which fit the shape and mechanics of the kid’s tooth structure protecting child’s enamel without hurting the gums. Bristles made of materials with 3D round-head bristles could deeply clean oral blind spot and food residue. ?Make kids Love Brushing?They don’t like brushing? Bargain with you for brushing? Speak of brushing then they cry? CHAIN PEAK Musical children's sonic electric toothbrush could solve all troubles regarding kid’s brushing things. With 4 English musics and cute cartoon design, kids will love it at a glance. It is great tool for raising children's brushing interests. Music could be turned off or turned on by long press of the power button for 3 seconds.