The DEI9931-124.80MHz from Dynamic Engineers is a Band Pass Filter with Frequency 124.774 to 124.826 MHz, Bandwidth 52 kHz, Center Frequency 124.8 MHz, Insertion Loss 6.5 dB, Rejection 8 dB@±50 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9931-124.80MHz can be seen below.