W505 module with green substrate and a tan plastic extraction handle, attached by two rivets. Handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS" in raised letters. The reverse side of the substrate (with solder joints) reads "LOW VOLTAGE DETECTOR W505A" along the edge. The obverse side is covered by a variety of components, the largest of which reads "BOURNS TRIMPOT 200L-1-502 5K 645 AA." An inspection stamp reading "TESTED 237" is located near the right-hand rivet.