The 6R7-1575.42-X15N11 from Reactel is a Band Stop Filter with Stopband Frequency 1.56792 to 1.58292 GHz, Bandwidth 15 MHz, Insertion Loss 1.25 dB, Rejection 70 dB. Tags: Module with Connectors, Notch Filter. More details for 6R7-1575.42-X15N11 can be seen below.