The UF9928R from MtronPTI is a Band Pass Filter with Frequency 5.11 to 5.12 GHz, Bandwidth 10 MHz, Center Frequency 5120 MHz, Insertion Loss 1.5 dB, Rejection 20 to 50 dB. Tags: Module with Connectors, Cavity Filter. More details for UF9928R can be seen below.