With three levels of integrated signal technology – GPS positioning, a powerful 406 MHz signal, and 121.5 MHz homing capability – the ResQLink 400 quickly and accurately relays your position to a worldwide network of search and rescue satellites. This model has a built-in strobe light providing visibility during night rescues and also has an infra-red strobe to help aid rescuers wearing night vision goggles. Additionally, a multifunctional clip system is included so you can choose how you attach your PLB.