Nest T5000SF Smart Home Temperature Sensor - White

Temperature sensor Lets your thermostat know the right temperature in every room where you place it. Compatible with select Nest thermostats Including Nest Learning Thermostat, 3rd Gen and Nest Thermostat E. Wireless Low Energy connection. Up to 50 feet range Allows easy placement. Long battery life Works on CR2 3V lithium battery (includedwith up to 2 year lifetime.