Material:Shell:100% plastic braces:100% silicone Feather1.Clean tooth black technology is newly upgraded,ultrasonic automatic mouth toothbrush. 2.Small and beautiful,multi-color options.The optimized body is smaller,the frequency is enhanced,the battery life is increased by 10 days,the battery is 400 mAh,the brush head hair removal is encrypted, and the cleanliness is as high as 99%. 3.Japanese black technology automatic U-shaped toothbrush,ultrasonic motor,400 vibrations per second,360-degree U-shaped brush head,so that the inside of the teeth can be easily cleaned.Cold light whitening,scientific light,easy whitening. 4.Low noise and high frequency,core technology,sonic motor. 5. new way of brushing,you can brush without hands,brushing your teeth in 360 degrees,truly free your hands. 6.One-key operation,integrated molding,bringing both hand and aesthetic experience. 7.Deep waterproof,wash the whole body without fear of water source. 8.Unique silicone toothbrush,strong antibacterial,safe and durable,collects thousands of dental trays confirmed by dental model,accord with ergonomics. 9.Sonic motor,quiet,like whispering.