The P50 VHF (5-Watt) transceiver was retired in June 1995; some replacement parts remain available (see Ordering Info). This VHF radio covered the 150 to 162, 162 to 174 MHz frequency ranges. The P50 required an FCC frequency assignment and a frequency-matched antenna and cable. The transceiver was powered by the data logger or an external rechargeable 12 Vdc power supply (5 Ahr minimum capacity).