Fully remote controllable radiator valve Works as part of the Lightwave RF home automation system Allows each room to be individually controlled for temperature Simply screws into place if you have a compatible thermostatic radiator valve Control via your Smartphone or the web wherever you are Requires Lightwave RF Boiler control unit Simple in-line installation Lightwave RF Radiator Valves allow individual control of all of your radiators without the disruption & cost of installing purpose built zoned heating. The Lightwave RF valve replaces your existing radiator valve by simply screwing into place. Set the individual temperature of each radiator using the valve itself or the accompanying Wall Stat which can manage several radiators in the home. You can also set timers cut off temperatures & even turn your heating on & off remotely using a smartphone if you have the Lightwave RF Boiler control & Wifi-Link installed. If linked to the Lightwave RF Window Switch the intelligent valves can automatically switch radiators on or off if a window is opened or closed in the same room saving energy & money.brbr Please note This feature requires the optional Lightwave RF Wi-Fi Link Order Code N55LL.br