The 3078-2850 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 2.7 to 3 GHz, Bandwidth 300 MHz, Center Frequency 2850 MHz, Insertion Loss 3 dB, Rejection 50 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 3078-2850 can be seen below.