The Honeywell CG512A LG Thermostat Guard is a clear plastic shield designed to prevent tampering with the thermostat. It features an inner shelf to keep the thermostat safe and secure while allowing for easy access. This guard is compatible with Honeywell thermostats and provides a convenient solution for protecting your thermostat from unwanted changes. Its rectangular shape and auto system switching make it a practical and efficient choice for maintaining optimal heating and cooling settings in your home, key. New.