Oral‑B iO: Compatible heads only for the Oral-B iO series. Not compatible with other Oral-B toothbrushes.
Philips Sonicare: Compatible with Philips Sonicare models with snap-on heads. Not suitable for very old screw-on or specific Kids/PowerUp models.
Oral‑B (excluding iO & Pulsonic): Compatible heads with most electric Oral-B toothbrushes (Vitality, Pro, Smart, Genius). Not compatible with the iO and Pulsonic series.
