Small but resilient, the ResQLink 400 has been professionally engineered and tested to ensure it can withstand even the harshest elements. This buoyant Personal Locator Beacon requires no subscription for use and can be utilized to enhance your safety in a wide variety of environments. Whether on land, at sea, or in the air, trust that the ResQLink's satellite precision and military durability, puts rescue in the palm of your hands. 4.52" (L) x 2.03" (W) x 1.49" (D) No Subscription RequiredGPS and Galileo GNSSBuilt-In BuoyancyStrobe and Infrared StrobeGlobal CoverageMEOSAR CompatibleSmall and lightweight5 year battery life24+ hours Operational Life**Multi-function Clip System Included**Based on test report from accredited laboratory