40,000 VPM Smart Toothbrush – Beauty, brains and power. The Black Series is a world class modern electric toothbrush packed with the most up to date technology. It features an ultra-powerful and industry leading motor producing 40,000 vibrations per minute , lithium-ion battery, ultra-fast wireless charging, 4 mode operation, smart vibration timers, 8 DuPont engineered brush heads and bristles, and a custom travel case; all with a sleek ultra-slim, lightweight and IPX7 rated waterproof design.