The Honeywell CG512A Locking Thermostat Guard is a white plastic guard designed to fit any rectangular thermostat. It is compatible with Honeywell thermostats and operates on a corded electric power source. The guard is programmable with a non-programmable system and has one heat and one cool stage. It also has a universal smart home compatibility with Ring devices, making it a convenient and secure option for controlling your thermostat.