usi (universal security instruments, inc.) produces the most innovative home protection solutions available today! since our founding in 1969, we’ve become one of the largest manufacturers of smoke and carbon monoxide alarms in the world. we hold 11 patents on detection technologies, which means we're on the cutting edge of 'keeping your family safe'​. usi has become one of the largest manufacturers of smoke and carbon monoxide alarms in the world. in july of 2003, usi was listed on the american stock exchange. our trading symbol is uuu. universal security has its headquarters in owings mills (a suburb of baltimore) and maintains strategic warehouse facilities throughout the united states which enables its customers to receive product the next day without the additional cost of overnight service. usi is dedicated to providing the highest quality products, while creating utmost customer satisfaction. usi manufacturing facilities is quality certified to iso 9001. twitter: @usialarms http