The RO3156E from Murata is a SAW Resonator with Frequency 868.75 to 869.15 MHz, Centre Frequency 868.95 MHz, Insertion Loss 1.2 to 2 dB, Capacitance 2.3 pF, Quality Factor Loaded 800. Tags: Surface Mount, SAW Resonator. More details for RO3156E can be seen below.