Philips Sonicare Built-in pressure sensor Sonic electric toothbrush. Purpose: Adult, Toothbrush type: Sonic toothbrush, Teeth brushing modes: Daily care, Gum care, Massage, Whitening. Power source: Battery, Battery type: Built-in, Battery technology: Lithium-Ion (Li-Ion). Number of handles included: 1 pc(s), Number of brush heads included: 2 pc(s), Included brush heads: 2x W2 Optimal White standard