The DF2RB1910L-20M1 from Innertron is a Band Pass Filter with Frequency 1.89 to 1.93 GHz, Bandwidth 20 MHz, Center Frequency 1910 MHz, Insertion Loss 1.5 dB, Rejection 46 dB@ 1680 to 1710 MHz. Tags: Surface Mount. More details for DF2RB1910L-20M1 can be seen below.