The ASR300.00A01-SD22 from Abracon LLC is a SAW Resonator with Frequency 299.925 to 300.075 MHz, Centre Frequency 300 MHz, Insertion Loss 1.5 to 2.5 dB, Capacitance 2.7 to 3.3 pF, Quality Factor Loaded 2000. Tags: Drop In, SAW Resonator. More details for ASR300.00A01-SD22 can be seen below.