Backcountry Access Tracker3 Avalanche Beacon Unit weight with batteries: 7.6 ounces/215 grams, Harness weight: 3.5 oz/100 grams Frequency: 457 kHz, Batteries: three AAA alkaline Battery life: minimum 1 hour insearch mode after 200 hours intransmit mode (approximately 250hours in transmit only or 50 hoursinsearch only) Range: 50 meters Certified to be in compliance withallapplicable North American andEuropean norms