The LPF2500M from Lotus Communication Systems is a Low Pass RF Filter with Frequency DC to 2.5 GHz, Stopband Frequency 3.675 to 8 GHz, 3 dB Cutoff Frequency 3075 MHz, Insertion Loss 1.5 dB, Rejection 20 to 30 dB. Tags: Module with Connector. More details for LPF2500M can be seen below.