The 20,000 rpm high-frequency vibration motor drives the brush hair to vibrate strongly, transforming water and toothpaste into countless tiny bubbles, which penetrate deep into the teeth to remove stains efficiently. At the same time, the noise is controlled below 55dB, giving you a comfortable and quiet brushing experience. Imported soft hair, specially designed for humid environments, effectively prevent the growth of most bacteria. At the same time, the 0.15mm ultra-fine soft bristles can not only penetrate deep into the gap between the teeth, but also reduce the damage to the gums during the brushing process. The blue faded bristles will gradually turn white, reminding you to replace the brush head in time. It supports one-click switching of 3 whitening modes to meet the needs of different groups of people. Smart memory mode, which automatically jumps to the last selected mode when powered on, taking care of your usage habits. Main Features Material: Antibacterial Bristle Brush Handle Size: 200.5*24.5*24.5mm Brush Head Size: 84.3*15*15mm Brush Handle Net Weight: 58g Brush Head Net Weight (Single): 4.5g Rotating speed: 18000±2000 rpm(Clean Mode)20000 rpm Max Battery Capacity: 800mAh Charging Method: Type-C Charge Port Charging Time: 4hrs±30min Available time: 520min/130 Days Standby Time: 38 months (Theoretical value) Waterproof Rate: IPX7 Package: 1* Electric toothbrush