♥ Clean Sonic of Maruman is 18,000 strokes / min. Peace of mind to you can use. Brush softer nylon material. It will be able to your mouth care easy to clean. Here recommend clean Sonic! - Because ultrasonic vibration speedy & clean , about 18,000 strokes / min of detergency capture the inter-tooth mountain cutting cut brush Body material: ABS resin hair material: nylon heat-resistant temperature: 50 degrees hardness of hair: softer Waterproof: daily life waterproof use battery: (not included at the time of purchase) AAA alkaline batteries one battery life: about 60 days (2 minutes once, in the case of the use twice a day) ※ battery life only be a guideline , it does not guarantee the use period.

♥ For 3A alkaline batteries (This product not include battery)