The LPF2850M from Lotus Communication Systems is a Low Pass RF Filter with Frequency DC to 2.85 GHz, Stopband Frequency 4 to 9 GHz, 3 dB Cutoff Frequency 3300 MHz, Insertion Loss 1.5 dB, Rejection 20 to 30 dB. Tags: Module with Connector. More details for LPF2850M can be seen below.