The R1920 from Qualcomm is a SAW Resonator with Frequency 433.92 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.4 to 1.9 dB, Capacitance 2.7 pF, Quality Factor Unloaded 8000 to 11400. Tags: Surface Mount, SAW Resonator. More details for R1920 can be seen below.