what is the difference between this and the product HX6857/28 (ProtectiveClean 6100)? everything looks the same. Is the charger and travel case also included?
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