The NBP-2005 from Stellant Systems is a Band Pass Filter with Frequency 1.75 to 1.85 GHz, Bandwidth 100 MHz, Center Frequency 1800 MHz, Insertion Loss 0.4 dB, Upper Rejection 50 dB @2.125 to 6 GHz. Tags: Module with Connectors. More details for NBP-2005 can be seen below.