The DEA202450BT-1275A1 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 1.28 to 1.6 dB, Rejection 6 to 33.4 dB. Tags: Surface Mount. More details for DEA202450BT-1275A1 can be seen below.