The SF3030AO-1450MHz-A from Dynamic Engineers is a Band Pass Filter with Frequency 1447.5 to 1452.5 MHz, Bandwidth 5 MHz / 37 MHz, Center Frequency 1450 MHz, Insertion Loss 2.5 to 4 dB, Upper Rejection 30 to 55 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-1450MHz-A can be seen below.