The LPF3800M from Lotus Communication Systems is a Low Pass RF Filter with Frequency DC to 3.8 GHz, Stopband Frequency 6 to 13 GHz, 3 dB Cutoff Frequency 4850 MHz, Insertion Loss 1.5 dB, Rejection 20 to 30 dB. Tags: Module with Connector. More details for LPF3800M can be seen below.