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Nest Temperature Sensor pairs with the Learning Thermostat to control temperature in specific rooms. (Nest)
Google-owned Nest on Thursday announced the Nest Temperature Sensor that connects with its thermostats to make sure a certain room is the exact temperature you want it to be. The 1.9-inch by 1.9-inch temperature sensor has a two year battery life and operates using Bluetooth Low Energy.
Nest’s external temperature sensors will be available in April for $39 each, or $99 for a pack of three. They’re compatible with the second and third-generation Nest Learning Thermostats and Nest E. Nest explains on its website:
Most homes aren’t the same temperature in every room. Maybe the living room gets too warm or the baby’s room is too cold. With the Nest Temperature Sensor, you can let your Nest thermostat know which room should be a certain temperature at a certain time of day. And that room will be always be the most comfortable.

Google-owned Nest is now shipping the Nest Hello video doorbell for $229. (CNET/CBS Interactive)