Bogen SM4T Easy Mount Cone Speaker (White)The Bogen SM4T Easy Install Speakers are surface mount speakers, designed to typically install in less than a minute. Installation is a simple, three step process that does not require tools. First, two specially designed studs pierce the ceiling tile. Second, two custom designed wing nuts secure the speaker to the ceiling. Third, standard wire nuts make the electrical connection directly to the color coded studs. SM4T are lightweight, durable