Both models are supplied with the following accessories:
- 1 handpiece
- 1 charger (charging station)
- 1 travel case
The main difference lies in the number of brush heads supplied:
- HX6859/29: Contains 2 W2 Optimal White brush heads
- HX6857/28: Contains 1 W2 Optimal White brush head
For example, in the "Gum Care" programme, the sequence is as follows: First 2 minutes of cleaning (4 x 30 seconds*), then 1 minute of massage (4 x 15 seconds*) with a lower vibration frequency.
* The vibrations are interrupted for a fraction of a second at a time.
The model has 3 cleaning programmes (clean, white, gum care). These programmes have different types and intensities of vibration. However, there is no setting for e.g. the intensity of the vibration of a cleaning programme.