The RO3101A from Murata is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.5 to 2.2 dB, Capacitance 2.4 pF, Quality Factor Loaded 1458. Tags: Surface Mount, SAW Resonator. More details for RO3101A can be seen below.