The CBP-840C+ from Mini Circuits is a Band Pass Filter with Frequency 790 to 890 MHz, Center Frequency 840 MHz, Insertion Loss 0.6 to 2 dB, Upper Rejection 20 to 30 dB, Lower Rejection 20 to 30 dB. Tags: Surface Mount, Ceramic Filter. More details for CBP-840C+ can be seen below.