Emmi Dent E4 4x Spare Ultrasonic Toothbrush Heads

The Emmi-dent brush head contains a specially patented ultrasonic microchip. It is recommended that you replace your Emmi-dent ultrasonic toothbrush head every three months. A worn Emmi-dent brush head transmits less ultrasound through its bristles and therefore does a less effective job of cleaning your teeth.

Price: 20.99 from Conrad Electronic