* 2.0 Digital USB stereo speaker system * Advanced digital USB audio for premium sound clarity * No batteries or power supply required; a single USB cable supplies both audio and power. * Sturdy, compact design with contemporary gloss detail * Built-in, easy-access control buttons for volume and mute * Digital power indicator * Protective travel case makes mobility easy * 3-Year guarantee . Logitech International S.A., Cité du Lignon 2, 1219 Geneva, Switzerland, Kontakt: https://support.logitech.com/contact