The 6MB/E-2100/U600-C3L from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1773.6 to 2426.4 MHz, Bandwidth 652.8 MHz (1dB), Center Frequency 2100 MHz, Insertion Loss 0.57 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/E-2100/U600-C3L can be seen below.