The HDF869A1 from Shoulder Electronics is a Band Pass Filter with Frequency 865.5 to 872.5 MHz, Bandwidth 7 to 13.8 MHz, Center Frequency 869 MHz, Insertion Loss 3.2 dB, Ripple 1.2 to 2.0 dB. Tags: Surface Mount, RF SAW Filter. More details for HDF869A1 can be seen below.