Dimensions: Height: 5.3 inches. Width: 5.3 inches. Depth: 1.5 inches.
Weight: 13.2 ounces.
Color: Black or White.
Pre-installed languages: English (USA), Spanish, French, Dutch, and English (British).
Power: 120V Connector. 3 long-life AA Energizer® Ultimate Lithium backup batteries.
Split-Spectrum Sensor: 450 nanometers of wavelength and 880 nanometers of wavelength.
Electrochemical carbon monoxide sensor.
Heat sensor: ± 1.8 degrees Fahrenheit.
Humidity sensor: ± 3% relative humidity.
Occupancy sensor: 120 degrees field of view to 20 feet.
Ambient light sensor: 1-100k Lux Dynamic Range.
Omnidirectional microphone: 70 decibels adjusted signal-to-noise ratio.
Speaker: 2 Watt.
Horn: 85 decibels sound pressure level at 10 feet.
Color ring with 6 LEDs.
Connectivity requirements: Wi-Fi connection with Internet access. Phone or tablet with iOS 8 or later or Android 4.1 or later. Free Nest Account.
Operating temperature: The alarm should not be installed in locations where the normal ambient temperature is below 40 degrees Fahrenheit or exceeds 100° Fahrenheit.
Warranty: 2-year limited warranty.