The DEA205437BT-1200 from TDK is a Band Pass Filter with Frequency 5.15 to 5.9 GHz, Bandwidth 750 MHz, Center Frequency 5.525 GHz, Insertion Loss 1.1 to 1.5 dB, Rejection 35 dB. Tags: Surface Mount. More details for DEA205437BT-1200 can be seen below.