Details from BCA:
Simplicity is speed. Our streamlined, high-performance backcountry beacon used for avalanche safety with real-time display. This BCA product includes a harness and batteries.
The BCA Tracker S™ Avalanche Transceiver has the performance, ease of use and instantaneous real-time display of the Tracker 3, without motion-sensing or upgradeable software, which are advanced features needed by snow professionals while in an avalanche area. This Backcountry Access beacon is used to find people while in an avalanche and prevent death or injury by locating the transceiver.