Amazon Mystery Box XL – 50+ items in one box! We offer an Amazon customer returns Mystery Box containing more than 50 different items. Inside the box you may find: Electronics and electrical goods, Household and home goods, Kitchen accessories, Lighting and accessories, Tools and various accessories, Tech accessories, Other interesting and useful items. What should you know about the Mystery Box? More than 50 items in one box. Products from different categories. Amazon customer returns.