The cost of this unit is not a problem for many users since it is directly proportional to the services being offered. If you’ve never given the Ardwolf sensor a thought, now’s the perfect time to make a change. Be sure to also check out our list of the best fire extinguishers for more great items like this. There is another spectacular smoke detection alarm system from First Alert in our list of recommendations. Meet the First Alert One Link Smoke Detector system. This is a multifunctional unit that operates as a carbon monoxide detector and a smoke detector. It is an all new unit designed to make use of the Alexa voice system and Apple’s home kit. All its operations are guided by a hardwired photoelectric smoke and electrochemical carbon monoxide system. The Onelink unit from First Alert isn’t only equipped with the power of Alexa, and it is also backed by unparalleled reliability thanks to its utilization of a state of the art, Omni directional speaker. The Onelink fire detector offers users remote notifications in the event of an emergency. It has a Home app through which users get to monitor the carbon monoxide levels of their home.