The MP02987 from Golledge is a SAW Resonator with Frequency 399.925 to 400.075 MHz, Centre Frequency 400.01 MHz, Insertion Loss 0.9 to 2 dB, Voltage 5 V, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, SAW Resonator. More details for MP02987 can be seen below.