New arrival Egoway Ultra-portable Full Size Virtual Wireless Bluetooth Laser Projection Keyboard English QWERTY keyboard layout. Truly portagle design:perfect for on-the-go Full size key pitch and shortcut keys for ease of operation. Superior durability (No moving component inside) Built-in Lithium-ion Polymer rechargeable battery(Capacity: 600mAh (Max) / 3.7V; Approx. 120 minutes--with continuous use) for mobility and convenience Compatible with latest operating systems: Windows XP & later, Windows Phone 7 & later, iOS4 (iPhone 3GS & later, iPad), Android 2.1 and later, Mac OS X & later