All of our electronic products are designed and rated for use in the United States using 120 volt current. We advise you to use a reputable carrier service when returning your goods. Please check the Voltage information and make sure it matches the one in your country. In case it’s not stated in the description, do ask us. We guarantee that your issue will be solved quickly. We usually respond within 24 hours on weekdays. Engineered Now The Original Headrest for The Herman Miller Aeron Chair H4 for. We do not accept P. BOXES – PLEASE PROVIDE A PHYSICAL ADDRESS.