The SF3030AO-300MHz-A from Dynamic Engineers is a Band Pass Filter with Frequency 297.5 to 302.5 MHz, Bandwidth 5 MHz, Center Frequency 300 MHz, Insertion Loss 1.4 to 2 dB, Rejection 40 to 64 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-300MHz-A can be seen below.