The RSR-77.00-80-S from Raltron is a SAW Resonator with Frequency 77.24 MHz (3 Channel) / 85.24 MHz (4 Channel), Centre Frequency 81.24 MHz, Insertion Loss 4.5 dB (Resonant Loss), Capacitance 2.8 to 3.1 pF, Operating Temperature -10 to 60 Degree C. Tags: Drop In, SAW Resonator. More details for RSR-77.00-80-S can be seen below.