Radio frequency signalling - wireless signalling between thermostat/programmer unit and the receiver at the heater Number of heaters - multiple heaters with receivers fitted up to a maximum total loading of 2kW Thermostat unit features: push on/off rotary control (5ºC-30ºC) with 30 minute boost Thermostat with programmer unit - 4 programmable on/off time periods for weekdays and weekends. LCD display with 12hr backup memory 3kW maximum loading Interface features: on/off switching only as signalled by the central controller Installation - requires a 46mm deep single gang metal back box for flush mounting each with a receiver interface unit fitted Controller features - 3 separate time clocks with hourly on/off period selection over 24hrs. Each can be allocated to one or more days of the week