The BPF-BC300+ from Mini Circuits is a Band Pass Filter with Frequency 290 to 310 MHz, Center Frequency 300 MHz, Insertion Loss 2.2 to 3.0 dB, Upper Rejection 20 to 45 dB @ 350 to 4000 MHz, Lower Rejection 40 to 50 dB @DC to 240 MHz. Tags: Surface Mount, Lumped Component Filter. More details for BPF-BC300+ can be seen below.