The RO3104C from Murata is a SAW Resonator with Frequency 303.75 to 303.9 MHz, Centre Frequency 303.825 MHz, Insertion Loss 1.3 to 2 dB, Capacitance 3.3 pF, Quality Factor Loaded 1300. Tags: Surface Mount, SAW Resonator. More details for RO3104C can be seen below.