The bca avalanche beacon tracker 3 has Backcountry Access Tracker's renowned ease of use and instantaneous real-time display. The beacon is designed to be “pocket-friendly,” and T3 is the choice of guides, mountaineers, and the weight-conscious crowd. This transceiver uses Signal Suppression (SS) and Big Picture (BP) modes for no-nonsense multiple-victim searching. Motion-sensing auto revert-to-transmit mode. Upgradeable software and electronics performance testing for Tracker3 fleet management. All transceivers include harness and batteries. The avalanche rescue probe is either a 240 or 270 centimeter snow probe designed for the pinpoint search phase in an avalanche rescue scenario. These are essential items for your avy rescue gear pack kit. Whether or you are backcountry skiing, snowboarding, snowshoeing, snowbiking, or snowmobiling. An avalanche beacon and probe are essential backcountry safety items for your pack. Always conduct a transciever check before departure into avalanche terrain. Each person should verify that their beacon can both send and receive the signals from each other's beacon. All Avalanche Rescue beacons manufactured since 1996 operate on the same 457kHz frequency.