The 4MB/C-4100/T300-S2A from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3924.5 to 4275.5 MHz, Bandwidth 351 MHz (3dB), Center Frequency 4100 MHz, Insertion Loss 1.6 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-4100/T300-S2A can be seen below.