The RO3156E-3 from Murata is a SAW Resonator with Frequency 868.88 to 869.02 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-3 can be seen below.