USB CHARGING : When connected to USB for charging, the LED will light up, and it only takes 3 hours to charge for 1 week. Safe, fast, convenient and easy to use at home or on travel. U-SHAPED TOOTHBRUSH HEAD : U-type toothbrush head made of food-grade silicone is very soft ,specially designed for children's tender gums and sensitive teeth.An extra toothbrush head is provided, you can trim it as needed. DENTAL BLUE LIGHT : When you use dentist-grade LED blue light to brush your teeth, automatic brush can speed up the whitening of teeth. No matter which speed setting you use, its brightness will increase 5 times the whitening effect. 360 ULTRASONIC CLEANING : Automatic brush can effectively scrub all areas in only 40 seconds. For deeper cleaning, just move the brush left and right to reach hard-to-reach areas. MAKE YOUR CHILD LIKE BRUSHING TEETH : This toothbrush is designed like a toy. Let your kids have fun while brushing their teeth! At the same time, it is a powerful children's electric toothbrush.