Specifications 1.38,000 powerful sonic strokes/min 2.built-in UVsanitizer 3.Induction rechargeable 4.DuPont bristle Specification & Features: 1.Power source ... available; (UL GS PSE BS Etc) .1.38,000 powerful sonic strokes per minute2.Advanced electronic control and electro mechanical driving ... ,000 times / minute. 6.Extra long usage time7.Waterproof design Rechargeable electric toothbrush