Google Nest Protect Smoke & Carbon Monoxide and similar items

Google Nest Protect Smoke Carbon Monoxide Detector Battery-Power, Expires 2029 Expires: 2029 Nest Protect ? The smoke alarm that thinks, speaks and alerts your phone. Nest Protect has been redesigned from the inside out. It has a Split-Spectrum Sensor and tests itself automatically. It?s also the first home alarm you can hush from your phone without any extra hardware required. And it tells you what?s wrong and can even alert your phone. What's in the box: Nest Protect ? 2nd Gen Smoke + CO Alarm Backplate Four screws User?s guide Welcome guide Six long-life AA batteries (Battery model) Requirements: Wi-Fi connection. Phone or tablet with iOS 8 or later, or Android 4 or later Free Nest account. Battery Six long-life AA batteries Battery model: Six long-life AA batteries (Energizer Ultimate Lithium ?L91?) Sensors: Split?Spectrum smoke sensor Electrochemical carbon monoxide sensor (Nest Protect's sensor lasts up to 10 years from the date of manufacture.) ? in this case, manufactured in 2021! Temperature Humidity Occupancy (120 field of view up to 20 feet) Ambient light Accelerometer Wireless: 802.11b/g/n (2.4GHz) Wi-Fi 802.15.4 (2.4GHz) Bluetooth Low Energy Audio: 80 dB @ 3 ft (1 m) @ 1kHz Speaker loudness: 80 dB @ 3 ft (1 m) @ 1kHz Horn 85 dB SPL @ 10 ft (3 m) Operating Temperature: 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). Weight: Nest Protect Battery: 13.9 oz (379.0 g) Dimensions: Length: 5.3 in (13.4 cm) Width: 1.6 in (3.95 cm) Height: 5.3 in (13.4 cm)