The HDF802A1 from Shoulder Electronics is a Band Pass Filter with Frequency 798 to 806 MHz, Bandwidth 8 to 28.9 MHz, Center Frequency 802 MHz, Insertion Loss 2.1 dB, Ripple 0.5 to 1.0 dB. Tags: Surface Mount, RF SAW Filter. More details for HDF802A1 can be seen below.