product description : logitech z-5 speakers colour : black total ftc power : 2 watts rms left & right : 1 watt rms x 2 (into 4 ohms, @ 1khz, @ 10% thd) total peak power : 4 watts signal-to-noise ratio : > 70 db frequency response : 70 hz - 20 khz sys req : pc - win xp or win vista; available usb port; cd-rom drive; 256 mb ram; 20 mb hdd mac - mac os x 10.3.9 or higher; available usb port; cd-rom drive; 256 mb ram; 20 mb hdd