The FNP-1523 from Filtronetics is a Band Pass Filter with Frequency 2.19 to 2.29 GHz, Bandwidth ±49 MHz, Center Frequency 2247.5 MHz, Insertion Loss 0.6 to 1.2 dB, Rejection 30 to 80 dB. Tags: Module with Connectors, Cavity Filter. More details for FNP-1523 can be seen below.