The SBA-100 audio system for SMART Board® displays offers ample supplementary audio output to enhance SMART Learning Suite audio and other multimedia content. The speakers feature 14W RMS power with both channels driven simultaneously for comfortable listening volume in rooms up to 1,000 sq. ft. (93 m2) in size (subject to room acoustics)

See specifications: http://downloads.smarttech.com/media/sitecore/en/support/accessory/sbaspeakers/specsheets/specssba100v28apr17.pdf