The MC4A2300F400FCB from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 2100 to 2500 MHz, Bandwidth 400 MHz, Center Frequency 2300 MHz, Insertion Loss 1.2 dB, Upper Rejection 40 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC4A2300F400FCB can be seen below.