The Ortovox 3 avalanche transceiver not only delivers excellent search capabilities but also features an innovative function designed to make it easier for rescuers to find victims wearing the 3. 3 has the ability to analyze its vertical orientation when buried and transmit its signal on the transmitting antenna best positioned for searchers to pick up a signal. Triple antenna design allows excellent precision and pinpoint search capabilities no matter what position the victim is buried in. Upon reaching a victim, the searcher can press the single button to mark the found victim and immediately set out for other snow burials by simply following the visual data. Marking a victim forces the transceiver to stop receiving the marked signal and focus on the next strongest signal. LCD screen features a circular display with a directional arrow and distance readout to guide you to the victim. Pinpoint search features semicircles around the edge of the screen that indicate whether you are getting closer to or farther away from the signal. Compatible with all standardized avalanche beacons operating on the 457 kHz frequency. Adjustable harness with case keeps the unit secure and accessible. Operates on 1 alkaline AA battery. Be sure to read the included instruction manual for important information regarding the use of the Ortovox 3 avalanche transceiver.