The NBP-2004 from Stellant Systems is a Band Pass Filter with Frequency 1.70 to 1.85 GHz, Bandwidth 150 MHz, Center Frequency 1775 MHz, Insertion Loss 0.35 dB, Upper Rejection 50 dB @2.9 to 8 GHz. Tags: Module with Connectors. More details for NBP-2004 can be seen below.