Avalanche beacons are essential safety devices used in backcountry skiing and snowboarding. They help locate individuals buried under snow after an avalanche. The beacon emits a radio signal that can be picked up by other beacons, allowing rescuers to find the buried person quickly. When a skier or snowboarder is caught in an avalanche, they can activate their beacon to send out a distress signal. Other users in the area can switch their beacons to "search" mode to detect the signal. This technology is crucial for enhancing safety in avalanche-prone areas, making it a vital tool for outdoor enthusiasts.