First Alert is definitely one of the most experienced American company when it comes with developing safety products has gathered more than 50 years of experience, but, with the rapid development of the IoT products and the emergence of full fledged smart homes which get more and more complex over the years, First Alert had to adapt to the new market and create its own line of smart smoke and CO detectors to rival the popular Nest Protect. This way, it came into existence the First Alert 2 in 1 Smoke Detector and CO Alarm which has some new technologies implemented such as compatibility with Z Wave products. I wouldn’t really call the Nest Protect an elegant device since for me, it looked more like a wireless speaker, but there is no doubt that it did take a step into the right direction when it came to the aesthetic value of smoke detectors. The Onelink took inspiration and adopted a similar design, but the cheaper First Alert 2 in 1 Z Wave remained humble, featuring an octagonal rugged plastic case, lacking the flashy circular LED light, but still being equipped with everything one would expect from a smoke and CO alarm. So, on the front of the device, there is a fairly large Test/Silence Weekly button, a Power/Smoke Alarm LED and a CO Alarm LED light. On the lateral side, towards the front, there is a sliding compartment where you can enter or replace the batteries simple AA.