Boston Acoustics BA 265 Computer Speakers Output Power:92 dB SPL at .5m listening position Power (each speaker) 2 watts Dimensions: H x W x D 7 1/4 x 4 1/16 x 5 3/8" (184 x 103 x 136mm) Driver Size: 3" (78mm) wide-range driver with MagnaGuard magnetic shielding Power Supply: 12V 300mA AC wall adapter