ACR ResQLink 406 MHz GPS Personal Locator Beacon. With Optional 406 Link's website Service. At 4.6 oz, the ResQLink weighs less than a couple of PowerBars. And topping at just 3.9 inches, it's smaller than the cell phone in your pocket. Small and mighty, the ResQLink is a full-powered, GPS-enabled rescue beacon designed for anglers, pilots and back country sportsmen. With three levels of integrated signal technology - GPS positioning, a powerful 406 MHz signal, and 121.5 MHz homing capability - the ResQLink quickly and accurately relays your position to a worldwide network of search and rescue satellites. A built-in strobe light provides visibility during night rescues. PLBs have been proven tried and true in some of the world's most remote locations and treacherous conditions. Just ask the 400 or so pilots, boaters and back country explorers who were saved by a PLB during a rigorous test program in Alaska. Based in large part on the test results, the federal government approved use of PLBs in the United States in 2003. Even in extreme conditions and situations, the ResQLink activates easily. Just deploy the antenna and press the ON button. With its powerful 66 channel GPS, the ResQLink guides rescuers to within 100 meters or less of your position. And, in the continental U.S., search and rescue personnel are typically alerted of your position in as little as five minutes with a GPS-enabled PLB such as t