The RO3073D from Murata is a SAW Resonator with Frequency 314.925 to 315.075 MHz, Centre Frequency 315 MHz, Insertion Loss 1.6 to 2.5 dB, Capacitance 3.94 pF, Quality Factor Loaded 1300. Tags: Surface Mount, SAW Resonator. More details for RO3073D can be seen below.