The D5TNF-2700/3800-20MHZ-N/N-GRI from K&L Microwave is a Tunable Filter with Frequency 2.7 to 3.8 GHz, Bandwidth 60 MHz, Rejection 25 dB @ 20 MHz, Insertion Loss 1 dB, Supply Voltage 28 V. Tags: Benchtop, Digitally Controlled. More details for D5TNF-2700/3800-20MHZ-N/N-GRI can be seen below.