Filters and boils simultaneously - there is no need to wait for the water to filter through the MAXTRA cartridge before boiling.
3.1kw Concealed rapid boil
Electronic cartridge replacement reminder -this indicator timer tells the end user when the MAXTRA cartridge is ready to be replaced
Blue light illuminates when boiling
2 year manufacturer's guarantee
Others are available here. http://www.instantbrita.co.uk/products.aspx