Every 30 seconds a pulse in the brush vibrations teaches your little one to brush each section of their mouth for the right amount of time. The brush powers off after 2 mins when you’re done. The toothbrush head vibrates, rather than rotating or spinning, the sonic action effectively and gently brushing kids’ teeth. Ideal for children with mixed baby and adult, or crooked teeth, the shorter bristles clean the tooth's surface and longer bristles reach between teeth and into the gum line. Use only KidzSonic replacement brush heads from Brush-Baby. No need to recharge - battery-operated. Durable and hard-wearing, BPA-free and tested to EU standards. Packaging materials - PET/Cardboard - widely recycled. Product materials - ABS Plastic - recyclable. Nylon Bristles - not currently recyclable.