Tracker avalanche transceivers have long been the fastest, easiest-to-use beacons int he 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.Specifications:- Size: 1SZ- Weight: ~ 7.6 oz / 215 g including batteries, not harness- Dimensions: ~ 4.7 x 3.0 x 1.0 / 12 cm x 7.5 cm x 2.6 cm- Frequency: 457 kHz- Power: Three AAA alkaline batteries- 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 search 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: US Patent #6,167,249 & 6,484,021 B1.- Certification: Certified to be in compliance with all applicable North American and European norms.