Two channel programmer giving independent control of heating and hot water Choice of 2 or 3 on/off cycles per day Installer can configure into full 7 day, 5+2 day, or 24 hour modes for optimum control or ease of programming, also gravity or fully pumped systems Service interval timer One hour boost facility Uses the industry standard backplate Factory set program which can be altered Automatic daylight saving time adjustment Permanently backlit display Battery backup in the event of mains failure Dimensions: H88mm x W135mm x D32mm