The D5TNF-2700/4000-10MHZ-N/N-GRI from K&L Microwave is a Tunable Filter with Frequency 2.7 to 4 GHz, Bandwidth 58 MHz, Rejection 35 dB @ 10 MHz, Insertion Loss 1 dB, Supply Voltage 28 V. Tags: Benchtop, Digitally Controlled. More details for D5TNF-2700/4000-10MHZ-N/N-GRI can be seen below.