Features: 3. High frequency vibration: This kind of scaler is very efficient, and high frequency vibration can remove tartar. 4. Waterproof scaler: The scaler is IPX6 safe and waterproof, suitable for daily use, high-quality, easy-to-clean teeth. 5. Comfortable handle: The integrated handle of the electric scaler is easy to grasp and work effectively. Description: Specifications: Color: red, blue (optional) Material: Silicone + Plastic Size: 183.6 * 30 * 22.3mm Style: rechargeable (built-in battery) Waterproof rating: IPX6 Rated power: 1W Nominal voltage: 3.7V Nominal current: 200 mA Standby current: 20uA Battery specification: 300 mAh Power adapter: 5V 500 mAh Charging time: less than 2 hours Engine noise: less than 60 decibels Working time: about 2 hours Package Included: 1 * Electric scaler 1 * Data cable 1 * Manual Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.