Allows accurate views of plants, invertebrates, and fish in their natural colors Provides an adjustable solution to mount LED light fixtures on virtually any aquarium Easy to install over the aquarium glass with the included screws, with no drilling or cutting A durable on/off rocket switch for lighting control Reccomended for aquariums 5 and 5.5 gallon 2"D x 10.6"W x 5.2"H Used but in excellent condition with no damage but no box.