The smallest, lightest PLB on the market, the affordable McMurdo Fast Find 210 Personal Locator Beacon with GPS provides true global coverage to find you quickly, even in the most remote of locations. 5-watt transmitter sends a 406MHz signal to the subscription-free COSPAS-SARSAT (Search and Rescue Satellite) system to pinpoint your location anywhere on the Earth's surface. Built-in 50-channel GPS with ceramic patch antenna includes your coordinates in the emergency satellite transmission to identify your exact position. Signal identifies your unique PLB and gives Search and Rescue the PLB owner's data and family contacts (requires free registration with NOAA or other national authority). Simultaneously transmits a 121.5MHz homing signal (similar to that of an avalanche beacon) to help rescuers speed up the local response time. Once activated, the Fast Find 210 signals will continue to transmit for at least 24 hours. Simple 3-stage activation: pull antenna cover off, unwrap antenna until it stands vertical and press the "ON" button (antenna cover must be replaced by manufacturer after use). LED signal light can be manually activated and blinks an SOS pattern to help searchers locate you during a nighttime rescue. Operates in altitudes up to 40,000 ft. and temperatures ranging from -4??F (-20??C) to 131??F (70??C). Sealed construction allows PLB to be immersed to 10m (33 ft.) for up to 5 minutes. Integral battery has a storage life of 5 years (battery must be replaced by the manufacturer). McMurdo Fast Find 210 PLB meets the rigorous testing standards of COSPAS-SARSAT, FCC, NOAA and the U.S. Air Force Rescue Coordination Center.