The 4MB/C-177.5/U15-S4G from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 167.3 to 187.7 MHz, Bandwidth 20.4 MHz (1dB), Center Frequency 177.5 MHz, Insertion Loss 2.05 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-177.5/U15-S4G can be seen below.