ACR Terrafix 406 GPS I/O – Communications: Reviews
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For adventurers in trouble, the ACR TERRAFIX 406 GPS I/O ($750) is among the first personal locator beacons with an internal GPS receiver, to bring help faster. When triggered, the eight-ounce waterproof device sends a distress signal to rescue teams, along with your lat/long coordinates, accurate to 100 yards.