Conveniently installs and connects to the S86WMUPR Wi-Fi Programmable Thermostat without running wires. Integrated LED indicates low battery status or when the sensor is in pairing mode. Control heat and cool calls through the primary thermostat or connect up to eight Wireless Indoor Sensors and control based on the average for more consistent temperature control and reduced hot and cold spots in the home. Set scheduled events in specific parts of the home with individual sensor input, offering improved temperature control when and where it is needed. Compact and convenient ultra-thin sensor body measures 1.79" x 1.79" x 0.53". Replaceable battery included with an approximate 1-year battery life. Battery status is reported on the connected thermostat for user-friendliness.