The Honeywell evohome Radiator Multi Zone Kit HR924UK consists of 4x evohome HR92 Radiator Controllers and allows multizone control of a radiator system when used with a Honeywell evohome Base Pack (ATP921G2080) or Honeywell evohome Connected Thermostat Pack. Fast mounting and taking into operation through simple commissioning. Fits on the most common radiator valves of the type m30x1,5. User friendly because of large, adjustable backlight display, it can be easily viewed or folded away flat. Compatible with iOS and Android operating systems. App needed for use: yes. Operates over wi-fi. Requires wireless router for use. Controls heating. Controls appliances. Monitors energy consumption. Components include 4x honeywell evohome hr92 radiator controllers, 4 x accessory sets & 8 x aa batteries. Batteries required 8 x AA (included). Size H6, W5.4, D9.6cm. 2 year.