ATTENUATOR AS SHOWN Super high quality looking unit, for RF attenuation at the push of a button! Has push buttons for 1 to 30 db You can select one button or multiples, as each can be toggled in or out. Please See last pict of an image we pulled of the web that shows the layout of buttons (note that label/grey faceplate in last picture is not included, just a pict from web so you can label the buttons if you wish, as well as see which end is the input if it matters) Attenuator was tested and tagged good by prior owner. It looks heavy silver plated all over, so has fair scrap value but too nice to scrap! from a websearch appears to be a module from a Dubrow TS-452 C/U Sweep Signal Generator / Oscilloscope LOOKS TO BE MILSPEC? (you can google search for whole article) From web: ?Dubrow TS-45?.used to check the alignment of intermediate-frequency and radio-frequency circuits in the 5 to 100 megacycle range. It may be used for the maintenance of equipment, as a laboratory instrument, for experimental work or for production testing.? So this attenuator I would guess to handle at least 5-100 mhz (range of TS-542) , but this unit may actually have a much wider range. Great for test bench or adjusting antenna levels, etc Measures approx 7x2x2 inch not counting buttons or BNC jacks.