Adds full heating schedule control to features offered by RET variants. User can set 2 heating periods with either 5/2 day or 24-hour scheduling, ensuring heating is either off or at reduced temperature when away from home or asleep. 5-35°C Temperature Range Suitable for Combi Boilers 2-Wire Installation Mains-Powered with Battery Backup Backlit LCD Display 5/2 Day or 24 Hour Programmable 2 Pre-Set Programmes 2 On / Off Periods per Day Without Boost Facility 5-35°C Temperature Range Suitable for Combi Boilers 2-Wire Installation Mains-Powered with Battery Backup Backlit LCD Display 5/2 Day or 24 Hour Programmable 2 Pre-Set Programmes 2 On / Off Periods per Day Without Boost Facility