The Tracker3™ has 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.Specifications:- Size: 1SZ- Dimensions: 4.6 x 2.8 x 0.9 inches / 11.6 x 7.1 x 2.4 cm- Frequency: 457 kHz- Max Range: 55 meters- Search Strip Width: 50 meters- Batteries: three AAA alkaline- Battery Life: minimum 1 hour in search mode after 200 hours in transmit mode (approximately 250 hours in transmit only or 50 hours in serch only)- Unit Weight With Batteries: 7.6 oz. / 215 grams- Harness Weight: 4.2 oz / 120 grams- Origin: Assembled and tested in the USA- Patent And License: US Patent #6,167,249 & 6,484,021 B1. Certified to be in compliance with all applicable North American and European norms.