Supershop&reg; 4GB Swimming Diving Water Waterproof MP3 Player FM Radio Earphone Black This item is a waterproof MP3 player & FM Radio designed for swimming, diving and other underwater sports. High durability aluminum casing with anti-scratch. USB rechargeable battery, it can work for 8 hours when fully charged. Compliant with international IPX8 water resistance standard. Perfect for sports like swimming, diving,climbing.