The HDF433.92A1 from Shoulder Electronics is a Band Pass Filter with Frequency 4336 to 434.77 MHz, Bandwidth 1.71 to 6.93 MHz, Center Frequency 433.92 MHz, Insertion Loss 2.5 dB, Power 0.1 W. Tags: Surface Mount, RF SAW Filter. More details for HDF433.92A1 can be seen below.