The RTR51 from Peak Communications is a Satellite Beacon Receiver with Beacon Input Level -70 to 60 dBm, Receiver Frequency 945 MHz to 2.15 GHz, Step Size 1 kHz, AC Voltage 18 to 24 Vdc, Power Consumption 25 W. Tags: Module with Connectors. More details for RTR51 can be seen below.