With the Oral-B Pro 2 2950N + Oral-B Cross Action (10 units), you and your partner can brush your teeth for over 1.5 years long without having to buy new brush attachments. This set includes 12 brush attachments in total. The pressure sensor makes sure you never put too much pressure on your gums. The toothbrushes come with CrossAction brush attachments. These have tilted brush hairs that provide extra deep cleaning between your teeth and along the edges of your gums. That way, you'll remove the bacteria that cause plaque and infected gums. The toothbrush has a 2-minute timer that helps you follow the recommended brush time.