DUAL 40,000 VPM SMART TOOTHBRUSHES - AquaSonic Duo features two world class toothbrushes with the most up to date technology. Each satin handle houses an industry leading 40,000 Vibrations Per Minutes ultrasonic motor that can be delivered via 3 unique modes. 10 DUPONT BRUSH HEADS & 2 TRAVEL CASES INCLUDED - Every DUO set comes with 10 brush heads engineered by world famous DuPont; a world leader in quality & materials science. Also included are 2 convenient color coded custom hard shell travel case made of BPA Free plastic with space for two brush heads. MODERN TECHNOLOGY - Each Duo toothbrush bring your oral health routine into modern times with its built in enhanced features. Super fast wireless charging, 3 distinct brushing modes and a smart vibrating notification timer are some of the enhanced features built in to the sleek and ergonomic waterproof black and white satin handles.