The MP04602 from Golledge is a SAW Resonator with Frequency 433.741 to 433.891 MHz, Centre Frequency 433.82 MHz, Insertion Loss 0.9 to 2 dB, Voltage 12 V, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, SAW Resonator. More details for MP04602 can be seen below.