Tracker avalanche transceivers have long been the fastest, easiest-to-use beacons in the industry. The Tracker4 just took it up a notch, with a rubberized over-molded case, larger LED display, and the same Tracker interface that basically makes it impossible not to find your companion. Signal suppression and Big Picture modes for no-nonsense multiple-victim searching. Motion-sensing auto revert-to-transmit mode. Upgradeable software and electronics performance testing for fleet management.