EPH 2 Zone 7 Day Electronic Programmer Time Clock R27-HW7 Day, 5/2 Day or 24 Hour Programmable3 Pre-Set Programmes1, 2 or 3 On / Off Periods per DayBacklit LCD DisplaySuitable for All Boiler TypesWall-MountedBattery Back-UpHoliday ModeAutomatic BST/GMT Time Change1 Year Guarantee