Dual voltage element ensures consistent boiling time with both 240 & 110 volt power supply. Water window so that you can see just how much water is being boiled. Tidy cord storage. Concealed element helps to reduce limescale. Illuminated on/off switch. Removable & washable scale filter prevents limescale entering drinks. 450ml (2 cups) max boil. Three level safety protection with automatic switch off, boil dry protection and thermal fuse.