The DEA162450BT-2181D1 from TDK is a Band Pass Filter with Frequency 2.4 to 2.5 GHz, Bandwidth 100 MHz, Center Frequency 2.45 GHz, Insertion Loss 1.78 to 2.2 dB, Rejection 25 to 41.2 dB. Tags: Surface Mount. More details for DEA162450BT-2181D1 can be seen below.