The 7MB/E-309/U34-S10W from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 289.95 to 328.05 MHz, Bandwidth 38.1 MHz (1dB), Center Frequency 309 MHz, Upper Rejection 40 dB, Lower Rejection 40 dB. Tags: Lumped Component Filter. More details for 7MB/E-309/U34-S10W can be seen below.