The InterCare toothbrush head features extra long and dense bristles to remove hidden plaque deep between teeth. It also significantly reduces gum bleeding and inflammation in just two weeks. The InterCare brush head syncs with your Philips Sonicare Smart handle and automatically selects the optimal brushing mode and intensity for exceptional cleaning. You only need to brush. Brush heads lose effectiveness after three months, but the Smart brush head recognition reminds you beforehand. Your smart toothbrush tracks how often and how hard you brush your teeth and notifies you when it’s time to replace the brush head. Don’t own a Philips Sonicare Smart toothbrush? Just watch the blue bristles. Once they turn white, it’s time for a new brush head. Your InterCare brush head fits perfectly on any Philips Sonicare toothbrush handle (except PowerUp Battery and Essence). Simply attach or detach it for easy replacement and cleaning.