The SRFLF-3E3DF-ISB7 from Suntsu Electronics Inc is a Low Pass RF Filter with Frequency 900 to 930 MHz, Bandwidth 30 MHz, Insertion Loss 0.5 dB, Rejection 30 to 40 dB, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Ceramic Filter. More details for SRFLF-3E3DF-ISB7 can be seen below.