The DF2Ri1890L-20M1 from Innertron is a Band Pass Filter with Frequency 1.88 to 1.9 GHz, Bandwidth 20 MHz, Center Frequency 1890 MHz, Insertion Loss 1.5 dB, Rejection 40 dB@ 1660 MHz. Tags: Surface Mount. More details for DF2Ri1890L-20M1 can be seen below.