The MF4A2050S100FCA from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 2000 to 2100 MHz, Bandwidth 100 MHz, Center Frequency 2050 MHz, Insertion Loss 1.7 dB, Upper Rejection 30 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MF4A2050S100FCA can be seen below.