Personal locator beacons (PLBs) are small, portable devices that emit a distress signal when activated. They are a lifesaver for hikers and other adventurers who spend time in remote areas without cell phone service or reliable GPS. fall alert How They WorkPLBs use a 406 MHz frequency reserved for distress calls, which can be heard by the search and rescue crews in your area.  Lone Worker Devices They’re also more accurate than other options, like cell phones and other emergency beacons, since they rely on satellites rather than towers.How They’re RegisteredPLB devices must be registered to a specific person, so they don’t become lost in the wilderness. Once they’re registered, your signal will be sent to a worldwide network of search and rescue satellites, which reroute it to the nearest receiving center.How They’re BuiltThe best PLBs are small, lightweight, and can communicate with you without a smartphone. They’re also easy to carry and recharge, making them an essential piece of gear for any hiker who wants to stay in touch with friends and family back home.They’re also incredibly affordable, so they make a great gift for any outdoorsy person who spends a lot of time in the backcountry. And unlike most other devices, they’re incredibly easy to activate and reset in case you lose them.Getting lost in the mountains is never a fun thing to do, but knowing what to do can make the difference between a safe return and a tragic outcome. We’ve reviewed the four best personal locator beacons for hiking, and we’ll help you find one that’s right for you.