The RSR-479.50-250-X from Raltron is a SAW Resonator with Frequency 479.25 to 479.75 MHz, Centre Frequency 479.5 MHz, Insertion Loss 2.5 dB (Resonant Loss), Capacitance 2.3 pF, Operating Temperature -10 to 60 Degree C. Tags: Drop In, SAW Resonator. More details for RSR-479.50-250-X can be seen below.