● Vibration method: W sound vibration ● Frequency: Horizontal polishing approx. 31,000 brush strokes / minute, Tataki polishing approx. 12,000 brush strokes / minute ● Doltz Appli: Expert supervised lesson video ● Polishing mode: 5 modes (W clean, normal, soft, sensitive, W gum care) ● Usage time: Approximately 22 days (approximately 90 minutes) W clean mode / W gum care mode: Approximately 11 days (approximately 45 minutes) 2 minutes Quick charge: Approximately 2 minutes ● Power supply: Rechargeable ● Charging time: Quick charge Approximately 1 hour / 2 minutes Quick charge ● Charging display: Charge remaining amount display ● Body dimensions: Approximately 23.5 x 2.9 x 3.5 cm (including brush) ● Voltage: AC100-240 V (with automatic voltage switching) ● Power consumption: Approximately 7 W (when charging) ● Battery type: Lithium-ion rechargeable battery ● Waterproof performance: IPX7 grade ・ Wash the entire body with water (main body only) ● Body mass: Approximately 110 g (not including the stand, including the brush) ● Set contents: Extra-fine bristle brush (compact), extra-fine bristle brush (large), clean & white brush, extra-fine bristle point polishing brush, carrying case, brush stand, charging stand, AC adapter ● EW-DP55-S equivalent