Bluetooth Ceiling Speakers IT is one of the best high efficient Class-D amplifier, audio signal processor, Bluetooth receiver and professionally designed speaker all integrated in one body, our Bluetooth ceiling speaker. About Company - Lucky Tone specializes in design and manufacturing of Public Address System (PA), Conference System and Professional Audio System. With power amplification, loudspeaker, and PA system management engineering resources all located under one roof. Visit us :- http://www.lucky-tone.com/product_detail/228.html