Model No. SM805A sound masking speaker ships completely assembled for suspended installation. It includes an 8 in. 12W driver with factory-wired 70V (4W) transformer mounted in a 325 cu.in. backbox with grille, pre-installed wire hangers, and a separate 4 ft. chain. The installer friendly system features externally accessible speaker leads at a single gang handibox cover with a 1/2 inch Romex connector.