Sorry I know little about the specs and found little on line. We welcome any advice.

Here is what we do know.

came out of 1968 vintage very high end broadcast grade PortaMike wireless mic receivers (for CBS broadcasting) in the 900 mhz range.

Has 3 BNC jacks marked L, X, R

Was good decommissioned equipment.

This unit is Marked DBM 200 , perhaps the 200 signifies 20db???

Includes right angle mount bracket you can take off if not needed.

dimensions of main can ( not counting bracket or BNC connectors)

in approx inches

2.25x1.25x.75

3oz.ea