The LP2500M0402AT from Frontier Electronics is a Low Pass RF Filter with Frequency 2.4 to 2.5 GHz, Insertion Loss 0.55 dB, Rejection 21 dB, VSWR 1.70:1, Operating_Temperature -40 to 85 Degree C. Tags: Surface Mount, Ceramic Filter. More details for LP2500M0402AT can be seen below.