The First Alert Onelink GLOCO Wi-Fi Environment Monitor provides the status of any room in your home at a glance. Enabled with Apple HomeKit, this monitor tracks temperature, humidity, and carbon monoxide levels. Get alerted to problems via a color-changing glow ring on the device, and information sent to your smartphone or tablet. If extremely dangerous levels of carbon monoxide are detected, the monitor sounds an alarm. Simply plug in the monitor, download the app to your smartphone or tablet, and start monitoring. A battery backup allows for continued monitoring in the event of a power outage. Ideal for checking on conditions in baby's room without disturbing a nap or keeping track of a vacation house, the Onelink Environment Monitor keeps an eye on things when you can't.