Honeywel T4R Wireless 7 Day Programmable Thermostat Y4H910RF4003 (Replaces CM927 CMS927 CM921 CMS921 CM727 CM721) Genuine Part - Hanicks

Wireless Programmable Thermostat will replace the following Honeywell CM Series products: CM921, CMS921, CMS921B1042 CM927, CMS927, CMS927B1049 CM727, CMS727, CMS727E1016 CM721, CMS721 7-Day Programmable Schedule - Configure flexible heating plans for each day or use preset 5/2/1-day options, with up to 4-6 independent time & temperature slots per day Wireless Convenience - Pre-paired thermostat and receiver with up to 30 m range; no binding needed for a straightforward install Dual Control Compatibility - Works with 24-230 V on/off systems (boilers, heat pumps, zone valves) and supports OpenTherm boilers via the receiver module Energy-Saving Smart Features - Includes TPI control, “optimum start/stop”, frost-protection down to 5 °C, and holiday mode (1-99 days) User-Friendly Design - Large backlit LCD, intuitive push-button interface, temporary override (1-2 hours), and automatic daylight saving adjustment Easy Installation & Maintenance - Flip-up wiring terminals, clear LED indicators, battery-powered (2×AA with low-battery alert), wireless relay, and clear wiring labels for quick setup