I bought this for my daughter. Her gums were too sensitive to use it. Used it twice. Has been disinfected and new brush heads included. Oral-B's Bluetooth technology connects to your electric toothbrush to the Oral-B App for personalized brushing routines and daily monitoring In-handle brushing timer pulses every 30 seconds to let you know when to switch areas of the your mouth 3 Mode Toothbrush Handle: (1) Daily Clean Plus visible Pressure Sensor lights up to indicate when brushing too hard. (2) Gum Care Mode massage mode(3) Sensitive Mode for a gentle routine Compatible with Oral-B Brush Heads for every Oral Care need: CrossAction, FlossAction, Precision Clean, 3D White, Sensitive Gum Care, Deep Sweep, Dual