The RO3101 from Murata is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.5 to 2 dB, Capacitance 2.5 to 2.7 pF, Quality Factor Loaded 900. Tags: Drop In, SAW Resonator. More details for RO3101 can be seen below.