<p>1. Wide Compatibility: Compatible with most Philips Sonicare electric toothbrushes.</p><p><br/></p><p>2. Function: The tongue head is for tongue cleaning, the interdental head is for cleaning between teeth, and the tartar-removal head is for cleaning teeth tartar — together they help clean your teeth and gums.</p><p><br/></p><p>3. Note: The package includes only one of these heads. Which one you receive depends on the specific product you purchased.</p>