As stand alone detectors, they may be useful as alarms against dangerous gases, but may not be able to detect smoke out of ordinary fires early enough. You’ll see that these wouldn’t be good fire prevention devices if that’s what you were looking for. It is recommended that the individual homeowner find out what possible hazards could emanate from various areas of the house before deciding on what kind of smoke detector to install. And when you think about the price, most times it becomes a trivial factor especially if you have to consider that you’re actually buying protection and peace of mind. Having mentioned price, you might as well consider testing one of these so called smart smoke detectors. Some of these can be turned off by waving your arm at it in case it is accidentally set off. These smart detectors also give out a preliminary warning tone that tells you there’s smoke somewhere in the house, and gives you a chance to act. Other than that, smart detectors are also connected in a wireless network, and are able to talk to each other. So if a fire occurs in the basement and you’re in the bedroom, these smart little things will still sound the alarm wherever you are in the house. With a price tag of $149, the Halo Smart Protect is undeniably one of the most pricey options on the market. The manufacturers market the device as the “most comprehensive solution for any home”, which in turn means that the manufacturers believe that the hefty price is justifiable.