The Honeywell Home C7189R Wireless Indoor Sensor is a remote sensor designed for use with Honeywell systems. It operates on battery power and is made of white plastic, weighing 1 lb. This sensor is compatible with Honeywell's Redlink Vision Pro and Prestige IAQ systems, providing accurate and reliable indoor readings for HVAC and refrigeration control. Its compact size and wireless functionality make it easy to install and operate, offering a convenient solution for monitoring indoor air quality and temperature levels.