The RO3073A-1 from Murata is a SAW Resonator with Frequency 314.95 to 315.050 MHz, Centre Frequency 315 MHz, Insertion Loss 1.5 to 2.2 dB, Capacitance 4.1 pF, Quality Factor Loaded 1300. Tags: Surface Mount, SAW Resonator. More details for RO3073A-1 can be seen below.