A Personal Locator Beacon (PLB) is a safety device used to signal for help in emergencies, especially in remote areas. When activated, a PLB transmits a distress signal to satellites, which then relay the information to rescue services. This allows for quicker response times in locating individuals in distress. PLBs are compact, portable, and designed to be waterproof and durable. They typically operate on a specific frequency, such as 406 MHz, which is monitored by search and rescue organizations worldwide. Users must register their PLB with relevant authorities to ensure accurate identification during rescue operations.