Single channel programmer (for use with room thermostats) with 3 different time periods (5 day plus 2 or 7 day programming) displayed on an easy view blue luminescent screen. Simple push button setting and select modes with full screen information providing automatic time control for domestic central heating applications. 7 day programming for use with room thermostat. 3 different time periods (5 day plus 2 or 7 day programming). 1 – 9 hour boost facility for instant control. Easy view 12 hour am/pm or 24 hour clock/timer display illuminated on setting. 1 – 9 hour boost facility for instant control. Burner symbol display shows on call for heat. Advance to next programme mode and permanent ON/OFF override. Holiday mode setting. Automatic summer/winter changeover. Surface mount with wall plate included. 3 wire connection (double insulated). 3 (1) A at 230V. Factory fitted battery for memory back-up.