The 4MB/C-2550/U180-S5 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 2433 to 2667 MHz, Bandwidth 234 MHz (3dB), Center Frequency 2550 MHz, Insertion Loss 1.75 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-2550/U180-S5 can be seen below.