Head offshore with confidence. With three levels of integrated signal technology-GPS positioning, a powerful 406 MHz signal, and 121.5 MHz homing capability-the AquaLink quickly and accurately relays your position to a wordwide network of Search and Rescue satellites, reducing search time and increasing your chances of survival. It's reliable signaling technology that has saved more than 25,000 lives since 1982. The AquaLink broadcasts a unique registered distress signal that not only tells rescuers where you are, but who you are. The onboard GPS can fix your position to within 100 meters and then utilizes a powerful 406 MHz signal to relay your distress call to orbiting satellites. As local Search and Rescue is deployed, a separate homing signal and integrated LED strobe light guide rescuers to your exact location. The AquaLink is small enough to be easily carried in a pack or pocket or can be worn on deck, at the helm, in quarters, or on a life vest. Average transmit time of 35 hours. Non-hazmat lithium battery pack lasts up to 11 years in storage. ACR Exclusive: Built-in GPS acquisition test mode allows you to test GPS functionality up to 12 times over the life of the battery. Waterproof down to 33' and will float if accidentally dropped overboard. 5.88"H x 2.25" W x 1.49" D. Five-year warranty.