[8 Brush Heads] Each brush head lasts 3 months so 8 will last for about 24 months.[IPX7 Waterproof] Rechargeable toothbrush with IPX7 rated waterproof design, so the entire toothbrush can be safely rinsed with water.[6 Cleaning Modes] The toothbrush has 6 modes. You can choose the mode you need.[Rechargeable Electric Power Toothbrush] 1 charge can be used for 15 days(2 times a day). USB cable ?????????????? 5V 1A Adapter (Adapter is not included in the package) [Warranty] If you have any problems for our Electric Toothbrush , please contact us, we will give you a satisfactory customer service.