The HDF815E from Shoulder Electronics is a Band Pass Filter with Frequency 805.5 to 825.5 MHz, Bandwidth 20 to 55.8 MHz, Center Frequency 815.5 MHz, Insertion Loss 1.7 dB, Ripple 1.0 to 1.5 dB. Tags: Surface Mount, RF SAW Filter. More details for HDF815E can be seen below.