The KFF6133A from CTS Electronic Components is a Band Pass Filter with Frequency 1.57 to 1.58 GHz, Bandwidth 2 MHz, Insertion Loss Less than 1 dB, Rejection 17 to 18 dB, Operating_Temperature 0 to 25 Degree C. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for KFF6133A can be seen below.