The second-generation Onelink Smart Smoke + Carbon Monoxide alarm comes in battery and hardwired models. Similar to the Nest Protect, the Onelink will not only sound an alarm, but also specify the ...

This feature can be turned off to preserve power on the battery-only models. The Nest Protect is extremely expensive compared with a standard smoke and CO alarm. To fully equip a two- or three ...

Traditionally, battery-operated smoke alarms used nine-volt batteries ... Some systems, like Google Nest Protect, can send alerts to your phone and connect to an external monitoring system.

Nest Protect smoke alarms are finally moving from the old ... check on the status of each device (including battery health), and run full safety checks on your home security setup.

On April 3, Nest Labs halted sales of the Nest Protect smoke and CO alarm and deactivated the hush feature, called the Nest Wave, over concerns that the alarm could be unintentionally deactivated.