Honeywell ST9400C Two Channel 7-Day Programmer The Honeywell ST9400C Programmer is a 2 channel 7-day programmer, designed for control of both heating and stored hot water in complete systems. Key Features and Benefits: Two Channel 7-Day Timer Line of Text (LoT) Display Provides Text Feedback that Gives Help and Programming Hints Large Backlit Display Automatic Summer/Winter 1 Hour Time Change Extra Hour Facility for up to 3 Hours Boost or Programme Extension Suitable for Mains, Low Voltage or Potential Free Switching Height: 155 x 113 x 49mm (HWD) Manufacturer's 1 Year Guarantee