The ASR423.22E from Abracon LLC is a SAW Resonator with Frequency 423.145 to 423.295 MHz, Centre Frequency 423.22 MHz, Insertion Loss 1.3 to 2.5 dB, Capacitance 2.4 to 2.5 pF, Quality Factor Loaded 1900. Tags: Surface Mount, SAW Resonator. More details for ASR423.22E can be seen below.