The 4MB/C-800/U40-S4G from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 770.5 to 829.5 MHz, Bandwidth 59 MHz (1dB), Center Frequency 800 MHz, Insertion Loss 1.63 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-800/U40-S4G can be seen below.