Whistles on boil An optional whistle that you can have on to sound when boiling so you know when your kettle has boiled, avoiding re-boiling & hence saves energy 3 kw element For fast boiling Illumination dual window water gauge This attractive feature will ensure you can see the level of water in your kettle clearly...no more guess work. The best way to save energy is to only fill your kettle to the quantity that you need. This clever feature makes filling easy...saving energy 360 degree cordless base For left or right handed use Removable limescale filter This limescale filter will stop scale getting into your drink, ensuring you can enjoy your hot drink without any bits