The MP01928 from Golledge is a SAW Resonator with Frequency 445.925 to 446.075 MHz, Centre Frequency 446.01 MHz, Insertion Loss 1.35 to 2 dB, Voltage 5 V, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, SAW Resonator. More details for MP01928 can be seen below.