The BFCN-1801+ from Mini Circuits is a Band Pass Filter with Frequency 1400 to 2320 MHz, Center Frequency 1802 MHz, Insertion Loss 1.5 to 3.0 dB, Upper Rejection 15 to 33 dB @ 3110 to 10000 MHz, Lower Rejection 20 to 25 dB @ DC to 1000 MHz. Tags: Ceramic, Ceramic Filter. More details for BFCN-1801+ can be seen below.