The 2859 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 3.73 to 4.56 MHz, Bandwidth 830 KHz, Center Frequency 4.15 MHz, Insertion Loss 3 dB, Rejection 60 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2859 can be seen below.
