The 2970 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 2.58 to 3.01 MHz, Bandwidth 425 KHz, Center Frequency 2.8 MHz, Insertion Loss 3 dB, Rejection 50 dB. Tags: PCB Mount, Surface Mount, Lumped Component Filter. More details for 2970 can be seen below.