The CSBP-D1189 from Mini Circuits is a Band Pass Filter with Frequency 1.13 to 1.25 GHz, Bandwidth 116 MHz, Center Frequency 1189 MHz, Insertion Loss 1 to 2 dB, Rejection 20 dB @ DC-950 and 1550-2400 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CSBP-D1189 can be seen below.