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This can be an effective way to integrate new, interconnected photoelectric smoke detectors with an existing hard wired interconnected ionization smoke detector network for protection against all types of fires. The alarms are also compatible with interconnectable First Alert CO and combination smoke and CO alarms, such as the First Alert SCO501CN 3ST Est. $50, which is covered in our section on combination smoke and CO detectors. Both of these smoke alarms use wireless technology to create their interconnected network. If you already have a wired network in place, the First Alert 7010B Est. $20 is a photoelectric smoke detector to consider. Also sold under the BRK brand, this smoke detector can be used on the same network with pretty much all current BRK and First Alert interconnectable smoke and CO detectors. You don't get the talking technology found in the pricier First Alert models, but there are latching indicators so you can see which smoke/CO detector in the network initiated the alert. However, that viewpoint is not universal. Though, as noted above, Wirecutter does not test basic smoke detectors, they do conduct research that includes talking to fire experts such as
Joseph Keenan, assistant fire marshal in Burlington, Vermont, who says that the better approach is to use separate devices so that each can be placed in locations that are best suited to their type. He also notes that, because ionization smoke detectors are more prone to nuisance alarms, if a
homeowner disables the device over that which is a very bad idea, by the way they lose all protection.
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It may also be illegal to record video or audio in public areas without a sign designating that you are doing so. These laws vary by state, so be sure you're familiar with the laws regarding covert video recording in your state. It is often legal to record someone without their
consent if only video is involved; audio recording without a party s knowledge has far more regulations than video under wiretap laws. For this reason, many of the home security systems on our lineup allow only one camera to record audio at a time, as it is almost always illegal to record another person s conversation without their permission. Commercial Security Cameras What is Legal?For small businesses, the same rules apply for home security cameras, though they are slightly less stringent. In any area where a person could have a reasonable expectation of privacy, video
surveillance without notice or permission is illegal.