The HD31334 from HD Communications Corp is a Band Pass Filter with Frequency 920 to 950 MHz, Center Frequency 935 MHz, Insertion Loss 3.5 to 4.5 dB, Rejection 30 to 47 dB, Upper Rejection 47 dB @ 980MHz. Tags: Module with Connectors, RF SAW Filter. More details for HD31334 can be seen below.