Length: 5.3 in (13.4 cm) · Width: 1.6 in (3.95 cm) · Height: 5.3 in (13.4 cm)

Nest Protect Battery: 13.9 oz (379.0 g) · Nest Protect Wired: 13.2 oz (375.0 g)

White

Split‑Spectrum smoke sensor · Electrochemical carbon monoxide sensor (Nest Protect's sensor lasts up to 10 years from the date of manufacture.) · Temperature · Humidity · Occupancy (120° field of view up to 20 feet) · Ambient light · Accelerometer

Six long-life AA batteries · Battery model: Six long-life AA batteries (Energizer® Ultimate Lithium “L91”) · Wired model: Three long-life backup AA batteries (Energizer® Ultimate Lithium “L91”)

802.11b/g/n (2.4GHz) Wi-Fi · 802.15.4 (2.4GHz) · Bluetooth Low Energy

40ºF (4 ºC) to 100ºF (38 ºC) · The alarm should not be installed in locations where the normal ambient temperature is below 40ºF (4 ºC) or exceeds 100ºF (38 ºC). Humidity range: 20%RH to 80%RH (non condensing).

80 dB @ 3 ft (1 m) @ 1kHz · Speaker loudness: 80 dB @ 3 ft (1 m) @ 1kHz · Horn · 85 dB SPL @ 10 ft (3 m)

Two-year limited warranty · Two-year limited warranty. For help, visit nest.com/support.

Complies with safety standards set out by UL · Nest Protect has been tested to comply with safety standards UL 2034, UL 217, and NFPA-72 set out by UL and California State Fire Marshal.

RGB color ring with 6 LEDs

Nest Protect: 2nd Gen Smoke + CO Alarm · Backplate · Four screws · User’s guide · Welcome guide · Six long-life AA batteries (Battery model) · Three long-life backup AA batteries (Wired model) · 120V AC connector (Wired model) · Three wire nuts (Wired model)

Wi-Fi connection. · Phone or tablet with iOS 8 or later, or Android 4 or later · Free Nest account.