The Adesso Xtream S4 is a High Quality Portable USB 2.0 Soundbar Speaker Subwoofer Loudspeaker for Notebook Speaker For Laptop Computer Tablet PC All-metal body, Build-in USB sound card decoder, play music by usb interface directly, no need 3.5 mm audio cable, very Convenient! You will enjoy it. Compatible to any PC, laptops, etc. Mini and compact, portable easy to carry music anywhere.High Power Output The Xtream S4 Sound Bar packs with 5w*2 large dual drive unit. High quality sound lets you indulge in the sea of music. Brings sound to life for a fantastically dynamic Audio experienceEasy to UseThe computer speaker is USB powered, The sound bar speaker is easy to install, simply connect the USB to your computer and you can start using it. Spin button more easy to operate.Built-in USB Stereo SoundThe Xtream S4 has a built-in soundcard, allowing direct plug-and-play with a simple USB connection and eliminating the need for separate audio connection. The speaker delivers clear and crisp stereo sound.Wide CompatibilityCompatible to any PC, laptops, etc. Mini and compact, portable easy to carry music anywhere.