The DR2-3150 from ECS Inc. International is a SAW Resonator with Frequency 314.925 to 315.075 MHz, Centre Frequency 315 MHz, Insertion Loss 10 dB, Capacitance 1.4 pF, Quality Factor Loaded 7000 Q. Tags: Drop In, SAW Resonator. More details for DR2-3150 can be seen below.