The RO3101E from Murata is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.4 to 2.2 dB, Capacitance 2.5 pF, Quality Factor Loaded 1228. Tags: Surface Mount, SAW Resonator. More details for RO3101E can be seen below.