The MC4A2250F300FCB from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 2100 to 2400 MHz, Bandwidth 300 MHz, Center Frequency 2250 MHz, Insertion Loss 1 dB, Upper Rejection 8 to 30 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC4A2250F300FCB can be seen below.