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Ultrasonic Toothbrush HSD-005 The use of ultrasonic cavitation effect, which issued 1.7MHZ ultrasound allows the water molecules are rapidly compressed, a large number of bubble squeezed broken instantly , resulting in a strong penetration and refraction effects, so that the tartar peeling off the teeth, but the teeth There is no injury, and get neatness, whitening. 1. Frequency: 1.7MHz 2. Special design for high and low frequency 3. Individually frequency modulation with auto-timer 4. Design for waterproof and skidproof function 1. Elimination of tartar: effective cleansing macular, tooth debris,calculus caused by tea, coffee, smoking and food residue. 2. Whitening teeth: low-frequency ultrasound penetration into the gum inside, not to hurt the gums and to protect teeth white composition, make the teeth glossy naturally. 3.Bactericidal anti-inflammatory: cavitation shock waves generated by the bio-mouth can kill bacteria in oral cavity, help to reduce inflammation of the mouth. 4. Clear the smell: the effective cleaning of the tongue , eliminate bad breath and smell; reduce bleeding gums, inhibit gingival recession. Included two AA batteries can be used for 45 days and 3 brushes head can be used for 90 days.