Kidde KF3 or 4899 230v mains 57C fixed temperature heat detector is interconnectable with the whole Firex range. It comes complete with backup power, either in the form of a 4 year Alkaline battery or a 10 year Lithium.
Guest (18.10.2018.)Bought as a replacement unit for existing alarm. Reasonable price, fast delivery and simple to fit. ThanksGuest (27.03.2017.)Installed with no problem.Kenneth (22.06.2016.)Excellent