The CSBP-A1843 from Mini Circuits is a Band Pass Filter with Frequency 1.77 to 1.92 GHz, Bandwidth 155 MHz, Center Frequency 1842.5 MHz, Insertion Loss 1.3 to 2.5 dB, Rejection 20 dB @ DC-1580 and 2095-3300 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CSBP-A1843 can be seen below.