iOS / Windows / Android COMPATIBILITY: Compatible with 3 major operating system: iOS / Windows/ Android. Supports most Wireless-enabled devices, including All-New iPad 9.7 2017/2018, iPhone X, iPhone 8 / 7 / 7 Plus Red, Fire HD 10, Fire HD 8, Samsung Tab A 10.1. | ULTRA-THIN & LIGHTWEIGHT: Folded: 6.37" * 3.8" * 0.4", unfolded: 12.6" * 3.8" * 0.2". Weighs only 138.8g (4.9 ounces). The innovative, foldable design easily fits into a purse, bag, or pocket. Suitable for travel & work | EASY ON / EASY OFF: The keyboard is automatically turned on when you open it and turned off when you fold it. | RECHARGEABLE: Built-in rechargeable battery supports 40-hour continuous working / standby 30 days, you can charge from any USB port using the included cable. | ERGONOMIC DESIGN: The full-size keyset with V-shaped frosting surface provides excellent sense of touch and comfortable typing experience.