The ECS-SDR1-4180 from ECS Inc. International is a SAW Resonator with Frequency 417.925 to 418.075 MHz, Insertion Loss 1.6 to 2 dB, Capacitance 1.7 to 2.3 pF, Quality Factor Loaded 1900 Q, Quality Factor Unloaded 11400 Q. Tags: Surface Mount, SAW Resonator. More details for ECS-SDR1-4180 can be seen below.