The JFCB2700T2900SF from JQL Electronics is a Band Pass Filter with Frequency 2700 to 2900 MHz, Insertion Loss 1.5 dB, Upper Rejection 10 to 40 dB, Lower Rejection 40 dB, Ripple 0.4 dB. Tags: Module with Connectors, Cavity Filter. More details for JFCB2700T2900SF can be seen below.