The DEA252450BT-2080B2 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 1.56 to 2 dB, Rejection 21 to 69.2 dB. Tags: Surface Mount. More details for DEA252450BT-2080B2 can be seen below.