The OEM Resideo CQ200A-1004 Replacement Thermopile Generator 750 Millivolt is a programmable thermostat with a 7-day schedule. It is compatible with Honeywell brand thermostats and operates on a corded electric power source. This compact and durable aluminum generator offers 2-wire wire configuration and is designed for use with universal compatibility. With its push-button control style and programmable features, this Thermostat Replacement Thermopile Generator is a reliable choice for maintaining optimal heating and cooling settings in your home.