The SR404A from SAW Components is a SAW Resonator with Frequency 403.475 to 403.625 MHz, Centre Frequency 403.55 MHz, Insertion Loss 1.1 to 1.8 dB, Capacitance 2.3 pF, Voltage 10 V. Tags: Surface Mount, SAW Resonator. More details for SR404A can be seen below.