The MED/SOLAS / Wheelmark approved NSR NAS1000 AIS Sart is a buoyant and waterproof Search and Rescue Transponder- TX channel: AIS1 (CH2087), AIS2 (CH2088)- Freq Tolerance: equal to smaller than 0.5 kHz- Communication Range: equal to bigger than 5 nm- Operation hours: equal to or bigger than 96 hours- GPS Fixing time: equal to or smaller than 1 minute- Battery Voltage: DC 7.2V- Storage Temp: -30°C - 70°C- Storage Time: 5 years- Operation temp: -20°C - 55°C- Floating type: Floatable