Meet ISSA™ 4 hybrid sonic toothbrush - designed to work with the way you naturally brush, delivering a powerful yet gentle clean that's clinically proven to improve overall oral hygiene by 140% in just one month. With Sonic Pulse technology and a unique hybrid brush head, it effectively removes plaque while protecting your gums. No bulky charging bases, no daily charging - just one USB charge for up to 365 days of effortless oral care.