The 7MB/E-428/U34-S10W from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 408.4 to 447.6 MHz, Bandwidth 39.2 MHz (1dB), Center Frequency 428 MHz, Upper Rejection 40 dB, Lower Rejection 40 dB. Tags: Lumped Component Filter. More details for 7MB/E-428/U34-S10W can be seen below.