PIEPS DSP Smart Transmitter Advanced transmitter search beacon for backcountry skiers and rescue professionals Built-in receiver detects and synchronizes signals of all nearby beacons Lets rescuers quickly locate multiple avalanche victims; 60-meter digital range 3-antenna system lets you pinpoint precise location and depth of signal Measures 2.95 x 4.5 x 1.06 inches (W x H x D); weighs 0.43 pounds