The RO2131D from Murata is a SAW Resonator with Frequency 314.3 to 314.4 MHz, Centre Frequency 314.35 MHz, Insertion Loss 1.6 to 2.5 dB, Capacitance 2 to 3.6 pF, Quality Factor Loaded 1066. Tags: Surface Mount, SAW Resonator. More details for RO2131D can be seen below.