Behringer MS16 High-Performance Active 16-Watt Personal Monitor System Compact stereo speaker system ideally suited for home studios, multimedia applications, keyboard and vocal monitoring, etc. Powerful 4" woofers and high-resolution tweeters powered by two 8-Watt amplifiers Separately adjustable 1/4" TRS microphone input mixable with stereo inputs for playback and vocal monitoring applications Stereo RCA inputs for sound cards, keyboards, etc. that can be used simultaneously with second stereo source (e. g. CD/MD player) through 1/8" TRS stereo input Kindly refer manual under the product description for installation instructions and alerts