• The Pro Series Wireless Programmable Thermostat is a BRAND NEW 2021 launched, 7 day programmable room thermostat designed to replace all existing Honeywell CM Series Wireless Thermostats. The 'Pro Series' is made in the UK by Resideo (who were formally part of Honeywell International Inc.)
• The Pro Series Wireless Programmable Thermostat will replace the following Honeywell CM Series products: CM921, CMS921, CMS921B1042 CM927, CMS927, CMS927B1049 CM727, CMS727, CMS727E1016 CM721, CMS721
• The Pro Series Wireless Programmable Thermostat works with the following Honeywell Wireless Relay Boxes: BDR91 HC60NG R6660D R8810A OpenTherm Bridge
• Replaces all Honeywell CM700 and CM900 series wireless thermostats
• Optimum Start & Stop saves energy and money by getting to the correct temperature at the correct time and turning off the heating early if the room temperature is correct.
• Updated user interface provide modern ‘on-screen’ feedback
• Built-in memory holds the user program indefinitely so that it is never lost – even if you remove the batteries

• Easily binds to all existing Honeywell Wireless Relay Boxes
• Box Contains: 1x Pro Series 7 Day Programmable Wireless Room Unit 2x AA Alkaline Batteries 1x Wall Mount 1x Stand Mount