Features:

Powered by Redlink Reliability
No Interference with Other Wireless Devices in the Home
Reliable Performance in All Climates
Installs in Minutes
Up to 5 Year Battery Life
2 Month Low Battery Warning
Battery Warning Displayed on Redlink Enabled Thermostats

Specifications:

Manufacturer: Honeywell
Manufacturer Part Number: C7089R1013
Product Type: Temperature and Humidity Sensor
Mounting: Vertical
Operating Temperature: -40 to 128 Degrees F
Humidity 0 to 100% RH (Condensing)
Dimensions: 2.15” x 5.85” x 3.7”
Weight: 0.49 lb.
Includes: (2) AA Lithium Battery