The SF3030AO-1234.5MHz-A from Dynamic Engineers is a Band Pass Filter with Frequency 1215 to 1254 MHz, Center Frequency 1234.5 MHz, Insertion Loss 2.8 to 4 dB, Upper Rejection 30 to 52 dB, Lower Rejection 30 to 57 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-1234.5MHz-A can be seen below.