The DEA202450BT-2038A1 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 2.49 to 2.6 dB, Rejection 20 to 48.8 dB. Tags: Surface Mount. More details for DEA202450BT-2038A1 can be seen below.