The RO3101D from Murata is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.3 to 2.5 dB, Capacitance 2.4 pF, Quality Factor Loaded 1250. Tags: Surface Mount, SAW Resonator. More details for RO3101D can be seen below.