The CB1880/60OK-B4 from G-WAY Microwave is a Band Pass Filter with Frequency 1850 to 1910 MHz, Bandwidth 60 MHz, Center Frequency 1880 MHz, Insertion Loss 1.2 to 1.3 dB, Rejection 30 to 40 dB. Tags: Module with Connectors, Cavity Filter. More details for CB1880/60OK-B4 can be seen below.