Philips 3100 series sonic technology, electric sonic toothbrush. Purpose: Adult, Toothbrush type: Ultrasonic toothbrush, Colour of product: White. Power source type: Rechargeable battery, Battery type: Built-in battery, Battery technology: Lithium-ion (Li-Ion). Number of handles included: 1 piece (s), number of brush heads included: 1 pc (s) (HX3675/13)