Honeywell sundial rf2 pack 3. Wireless twin channel control .Y9420S2005 ST9420C

The Honeywell Sundial RF2 Pack 3 is a wireless twin channel control system featuring a programmable thermostat with 7-day programming capabilities. This thermostats are designed for use with corded electric, battery, and hydronic heating systems, and are compatible with a wide range of heating systems including central heating radiators. The white, rectangular shaped thermostat has a low voltage power source and comes with a remote control for easy operation. With features such as wireless connectivity, timer functionality, and the ability to switch systems automatically, this Honeywell thermostat offers convenient and efficient control of your home's heating system.

eBay