Amazon Exclusive Starter Kit includes: 1 smart electric adult toothbrush handle and head, 1 charger, 1 carrying case and an extra refill brush head keep you humming for up to 6 months | Smart toothbrush guides you to brush better: Connected, Bluetooth toothbrush targets spots that need extra love | Powerful sonic vibrations in 3 modes: Personalize your pulse by choosing the vibration level that suits you; choose from normal, sensitive, or deep clean | Win-win situation: hum your way to clean with our sonic toothbrush and improve your brushing while earning points toward rewards | Electric toothbrush with timer: Reminds you to stick it out for 2 minutes | Rechargeable toothbrush battery: Keeps going for 10 days | Expert-designed handle: Your hand won't want to let go | Smart reordering: Amazon Alexa can let you know when you need a replacement toothbrush head, or you can set up smart reorders so you always have brush heads when needed