Comparison Rotex RKT79-S Smart stainless steel vs RZTK KS 2217RS 2200 W 1.7 L stainless steel

A device that allows you to estimate the amount of water in the kettle without opening its lid. Most often the water level indicator has the form of a scale applied either to the transparent wall of the container, or to a transparent insert in an opaque wall. In any case, this function allows you to measure the volume of filled water quite accurately, and not just determine it “by eye”. This possibility is especially important for models with open coils (see "Heating element"), in such devices, a mark on the indicator is usually applied to the minimum allowable water level.

Small removable mesh, usually located at the spout, that traps lime scale particles when pouring water. The filter is easy to remove for cleaning and prevents scale from entering the cup.

Boiling sound signal — a convenient feature that notifies the user when the water heating is completed. It is usually implemented as a short beep or melody after the appliance automatically turns off.