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Our favorite for a few years running is the Nest Protect. It's the most full featured alarm, blaring out a loud siren and telling you where the problem is. It works with a lot of other smart home systems, so for example it can turn on all your Philips Hue lights, making it easier to find your way out. However, if you don't want to spend more than $100 on a smoke detector—you should have several in your home—then check out the Roost Smart Battery. This 9 volt Wi Fi connected battery costs just $35, goes into any smoke detector, and alerts your phone when the alarm goes off. Make sure you check out all of our top picks for smart speakers, lights, locks, and more on our best smart home gadgets page.security home systems
The camera has two types – decentralized IP security camera and centralized IP security camera. A decentralized IP security camera has a built in recording function. A centralized IP security camera needs a NVR network video recorder program. The NVR program records images that are stored in a digital storage device. The digital storage device may be a SD memory card or a USB flash drive. A disk drive may also be a digital storage device.