SonicTrue® sonic technology gently vibrates the brush head, but at high speed, so the brushes effectively remove plaque build-up. With a speed of 80,000 movements per minute, water and toothpaste are simultaneously pumped into the spaces between the teeth, increasing the cleaning efficiency. Compatibility: TrueLife SonicBrush UV TrueLife SonicBrush GL UV Try the other products of the TrueLife brand, which are in the categories Electronics under the Christmas tree, Toothbrushes and Mouth and teeth. You can now buy the product with a 4% discount. If you are not sure about the choice of this product, be inspired by the category of Sonic replacement heads.