Nest Temperature SensorSize and WeightDiameter: 1.9 in (50mm)Height: 0.8 in (22.5 mm)Mass: 1.6 oz (45 g)BatteryOne CR2 3V lithium battery (included)Up to 2-year battery lifeFeaturesSenses temperatureCommunicates temperature to compatible Nest thermostatsSensorsTemperature sensorWirelessBluetooth Low EnergyRangeUp to 50 feet away from your Nest thermostat. Range can vary depending on your home's construction, wireless interference and other fatorsCompatibilityRequires an installed Nest Learning Thermostat (3rd generation) or Nest Thermostat E. Identify your thermostat at nest.com/whichthermostatUp to 6 Nest Temperature Sensors supported per connected thermostat and up to 18 Nest Temperature Sensors supported per homeOperating Tempertaure32 to 104 deg. F (0 to 40 deg C)Indoor use onlyCertificationUL60730-2-9, Particular Requirements for Temperaure Sensing ControlsGreenRoHS compliantREACH compliantCA proposition 65Recyclable packagingLearn more at nest.com/responsibilityWarranty1 year DimensionsProduct Depth (in.)1.9Product Height (in.)0.8Product Width (in.)1.9 DetailsAccessory TypeSensorColor FamilyWhitesMaterialPlasticPower OptionsBatteryRemote AccessRemote AccessRequires Hub?No Hub RequiredReturnable90-DaySmart HomeSmart Home EnabledSmart Home ProtocolBluetoothTamper ResistantYesVoice Control Hub RequiredNo Voice ControlWorks With