The AB836B972 from Anatech Electronics is a Band Pass Filter with Frequency 833.5 to 838.5 MHz, Bandwidth 5 MHz, Center Frequency 836 MHz, Insertion Loss 6 dB, Lower Rejection 75 dB @ Fc +/- 10 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB836B972 can be seen below.