ACR PathFinder3 NH SART Search And Rescue Radar Transponder with non-hazardous batteries. A Search and Rescue Transponder (SART) is mandatory for all commercial vessels that must conform to GMDSS, and any vessel carrying more than one life raft. The exclusive ACR test mode provides visual/audible feedback confirming operational status. When the SART detects a radar signal, it fires 12 intense radar blips, alerting the operator of the SART"s position, to aid in search and rescue operations. Features include: Non-Hazardous battery, mounting bracket, collapsible pole mount, high-impact polystyrene case, 33" lanyard, waterproof to 10 meters, and worldwide certifications. Operational life: 96 hours in standby mode, 8 hours in operational mode. Dimensions: 12.5" tall x 3" diameter. One year warranty.