home monitor systems
A bundle with the base station and two satellites costs $329. It's not a smoke detector, but the Airthings Wave Plus $269 can detect Radon, CO2, TVOCs, humidity, temperature and air pressure. It connects to your phone via Bluetooth, so you'll have to be within range if you want to receive alerts. 99 View at eBay$115. 99View at Newegg Business$127. 65View at Amazon?Nest’s smoke alarm detects both smoke and carbon monoxide, and when it does pick up something, it will not only sound an alarm, but will also tell you in what room the alert is coming from, and the nature of the alert.