The SF3030AO-1397.5MHz-A from Dynamic Engineers is a Band Pass Filter with Frequency 1395 to 1400 MHz, Center Frequency 1397.5 MHz, Insertion Loss 2.7 to 3.6 dB, Upper Rejection 8 to 49.5 dB, Lower Rejection 40 to 49 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-1397.5MHz-A can be seen below.