• Patented technology: The ultrasonic transmitter in the emmi-dent heads applies the effect directly where it is needed, eliminating biofilm and reducing plaque. • Superior dental hygiene: Thanks to ultrasonic technology, teeth are cleaned without scrubbing, just holding against the teeth. • M4 ultrasonic brush head: Especially suitable for children and people with small jaws, compatible with all emmi-dent Platinum ultrasonic toothbrushes. • Easy to attach: 4 integrated contact pins for easy connection with the emmi-dent Platinum handpiece. • Recommendation: Change the head every 3 months for optimal cleaning, as the ultrasonic transmissibility of the bristles decreases.