Oral-B iO Radiant White Replacement Head Electric Toothbrush White x4 is ideal for those that want a whitening effect. Only compatible with Oral-B iO handles, these heads stop you from getting frayed bristles again and allow you to enjoy a professional clean feeling every day. As a matter of fact, each head has high-density thin filaments that ensure a gentle cleanse and protect the gums. At the same time, the bristles are soft and have a specially-designed pattern with an overlay of concave and convex bristle trims so they adapt to the curves of the teeth and gums. On top of that, the thinner outer bristles surround each tooth and enable a delicate cleaning along the gumline. Additionally, these heads also combine a dentist-inspired round brush with angled bristles with polishing elements to gently remove surface stains and whiten the teeth.As a result, you get unique brush heads that offer a gentle energy of micro-vibrations for synchronized and consistent cleaning. Dentists recommend changing the brush head every 3 months for optimum results. Characteristics Good for: regular cleansing, cleansing each tooth individually, whitening the teeth; Presentation: four white electric toothbrush heads compatible with Oral-B iO handles. How to use Fit the Oral-B iO Radiant White Replacement Head Electric Toothbrush White x4 on the toothbrush and then apply toothpaste. Then, brush your teeth for 2-3 minutes, preferably after each meal, and before going to bed. Rinse with water. Brush at least twice a day. Finally, remember to change the toothbrush head every three months.