The DEA252450BT-7012D1 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 1.5 to 2.2 dB, Rejection 30 to 50 dB. Tags: Surface Mount. More details for DEA252450BT-7012D1 can be seen below.