The KFL177309 from Konnect RF is a Band Stop Filter with Stopband Frequency 880 to 915 MHz (Band -1), 925 to 960 MHz (Band -2), Insertion Loss 1 dB, Rejection 60 dB, Power 1 W (Average Power), VSWR 1.50:1. Tags: Module with Connectors, Notch Filter. More details for KFL177309 can be seen below.