The KFF6052A from CTS Electronic Components is a Band Pass Filter with Frequency 1.22 to 1.24 GHz, Bandwidth 20 MHz, Insertion Loss Less than 1 dB, Rejection 30 to 32 dB, Operating_Temperature 0 to 25 Degree C. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for KFF6052A can be seen below.