At 4.6 oz, the ResQLink and weigh less than a couple of PowerBars┬«. Plus, it's smaller than the cell phone in your pocket. The ResQLink and are full-powered, GPS-enabled rescue beacons designed for boaters, anglers, pilots and backcountry sportsmen. With three levels of integrated signal technology--GPS positioning, a powerful 406 MHz signal, and 121.5 MHz homing capability-- the ResQLink and quickly and accurately relay your position to a worldwide network of search and rescue satellites. A built-in strobe light provides visibility during night rescues. Dimensions: 1.3" x 1.9" x 3.9ÔÇŁ┬á Wt: 4.6 oz.