The 4MB/C-121.5/T9-14 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 115.9 to 127.1 MHz, Bandwidth 11.2 MHz (3dB), Center Frequency 121.5 MHz, Insertion Loss 3.6 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-121.5/T9-14 can be seen below.