SG-910 Battery Sonic Toothbrush
1.40000 strokes per minute.
2.2 brushing modes(super,normal)offer varying oral care needs.
3.2 minute auto-timer ensures dentist recommended brushing time.
4.30-seconds interval to make sure you thoroughly brush all four quandrants of your mouth.
5.Replaceable brush head and battery
6.2 AA batteries can last for 90 days (twice of 2 mins a day).