The BFCW-252+ from Mini Circuits is a Band Pass Filter with Frequency 2400 to 2500 MHz, Center Frequency 2450 MHz, Insertion Loss 3 to 4 dB, Upper Rejection 20 to 30 dB, Lower Rejection 20 to 25 dB. Tags: Ceramic, Ceramic Filter. More details for BFCW-252+ can be seen below.