The DEA205425BT-2028A4 from TDK is a Band Pass Filter with Frequency 4.9 to 5.95 GHz, Bandwidth 1050 MHz, Center Frequency 5.425 GHz, Insertion Loss 1.6 to 2.3 dB, Rejection 7 to 50 dB. Tags: Surface Mount. More details for DEA205425BT-2028A4 can be seen below.