Nest Protect Smoke Plus Carbon Monoxide

Availability: Pre-Order
Product Code: S2001BW

Quick Overview

  Tech SpecsSHOW DETAILED SGeneration2nd GenerationPowerBatterySix long-life AA Energizer® Ultimate Lithium batteriesWired120V ConnectorThree long-life AA Energizer® Ultimate Lithium backup batteriesColorWhiteFeaturesVoice alarms with custom location...

  Tech Specs


2nd Generation



Six long-life AA 
Energizer® Ultimate 
Lithium batteries

  • 120V Connector
  • Three long-life AA 
    Energizer® Ultimate 
    Lithium backup batteries


  • White


  • Voice alarms with custom location
  • Split‑Spectrum Sensor
  • Detects carbon monoxide
  • 10-year product lifetime
  • Heads-Up alerts
  • Sound Check
  • Nightly Promise
  • Pathlight
  • Steam Check
  • Self Test
  • Wireless Interconnect
  • Emergency Shutoff with Nest Learning Thermostat
  • Emergency clip record with Nest Cam
  • Home Report
  • Nest app
  • Phone alerts include:
    • Smoke
    • Carbon monoxide
    • Low-battery
    • Sensor failure
  • App Silence
  • Safety Checkup
  • Safety History
  • What To Do


  • United States: English, Spanish
  • Canada: English, French (Québécois)
  • Australia and United Kingdom: English (UK)
  • France, Belgium and Netherlands: French, Dutch
  • Germany and Austria: German, French

After setup, you can change the language
Nest Protect speaks to any of the above languages


  • Split‑Spectrum Sensor, 450nm and 880nm wavelength
  • 10 year electrochemical carbon monoxide sensor
  • Heat sensor, ± 1.8°F (± 1°C)
  • Humidity sensor, ± 3%RH
  • Occupancy sensor, 120° field of view to 20 feet
  • Ambient light sensor, 1-100k Lux Dynamic Range
  • Omnidirectional microphone, 70dBA SNR

Speaker, horn, 
and light ring

  • 2 Watt Speaker
  • Horn: 85dB SPL at 10 feet (3 m)
  • RGB color ring with 6 LEDs

Size and weight

  • Height: 5.3 inches (13.4 cm)
  • Width: 5.3 inches (13.4 cm)
  • Depth: 1.5 inch (3.85 cm)
  • Mass: 13.9 ounces (379 g)
  • Height: 5.3 inches (13.4 cm)
  • Width: 5.3 inches (13.4 cm)
  • Depth: 1.5 inch (3.85 cm)
  • Mass: 13.2 ounces (375 g)


  • Wi-Fi connection with internet access
  • Nest app on phone or tablet with Android or iOS. See the Nest app requirements for supported versions.
  • Free Nest Account


  • Working Wi-Fi connection: 802.11b/g/n @ 2.4GHz
  • Wireless Interconnect: 802.15.4 @ 2.4GHz
  • Bluetooth Low Energy (BLE)


Nest Protect has been tested to comply with safety standards in the United States set out by:
  • UL
  • California State Fire Marshal

Nest Protect complies with all of the following smoke and carbon monoxide alarm standards:
  • UL 2034 - “Single and Multi Station Carbon Monoxide Alarms”
  • UL 217 - “Single and Multi Station Smoke Alarms”
  • NFPA-72 - “National Fire Alarm and Signaling Code”


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

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