DURAGADGET Deluxe Laptop USB Powered Speakers For Apple Macbook Air / Mac book Pro (All Sizes - 11 / 13 / 15 Inch) With 7cm Bass Response - No Need For Power Supply! Your ears are going to be happyyou get a full, balanced sound with crisp highs, rich mids, and deep lows The 7.00 cm pressure drivers give you more bass response with less distortion You get power and sound with just one cord for added convenience. You can easily adjust the volume right from the front of your speaker Dimensions: 6 x 7 x 16 cm