Ortovox S1 transceiver, Like New, only used on one backcountry trip. Two devices available at $95 each. Complete with original package, instruction book and holder. When in transmit mode, the transceiver is strapped to your body, under a layer. When searching, the transceiver is opened by pushing a release button and opening it like a flip phone. It immediately goes into receive mode and provides on screen prompts that guide you to your victim(s). It locates multiple burials. Renders a bright screen even in direct sunlight. Requires 3 AAA batteries (not included). Transmission life approx 250 hours. Recently tested and both units work as designed.