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Brand: Xpreen Name: LED Display Electric Dental Cleaner Charging method: DC charging Model: XPRE128 Battery capacity: 250mAh Waterproof grade: IPX6 Storage temperature: -10 ° C-40 ° C     1. Built-in permanent magnet DC brush motor, 11,000 vibrations per minute Built in permanent magnet Brushed DC electric motor, 11000 times/minute vibration frequency 2. Three kinds of cleaning heads to solve tooth stains and calculus 2. Three types of cleaning heads to solve dental stains and stones3. Deep waterproof, random washing, safe and worry-free, can be directly washed underwater after use 3. Deep waterproof, easy to rinse, safe and worry free, can be directly rinsed underwater after use