Used on relay station assembly dgcp telephone 90-253; wsd: virginia class submarine, ssn-774. navy-relay station, dgcp power requirements; external power supply 90-253 vac, 47-63hz, autoranging, 20 watts max; standard connector
2.680" overall length 0.660" overall width extended, slotted jackscrews come with clips. the finish is olive drab cadmium surface treated hood, top opening w/jackscrew