Feature: English QWERTY keyboard layout. (Not support other language keyboard layout). Compact and ultra-portable for mobility. Lithium-ion Polymer rechargeable battery. Truly portable design: perfect for on-the-go. Superior durability (No moving component inside). Full size key pitch and shortcut keys for ease of operation. Without physical keyboard, small size, easy to carry, this projection keyboard can adapt to most of the working environment. Easy connection via Bluetooth 2.0 HID profile Ver. or USB. connection to main devices , like Tablet PC,Smartphone, Desktop PC and Video game . As a new input device, using the built-in infrared laser transmitter to project the standard keyboard on the working surface, you can locate the click position and input the information by the method of optical identification Compatible with: IOS4 or above, Android 2.1 or above, Windows XP or above, Windows Phone 7 or above, Mac OS Product Appearance Functional Description: Red light: long bright - Charging Off - Charging complete Blue light: Blinking - Pairing Status Off - paire Yellow light: flashes once - start normally USB connection mode: Method: USB device is connected USB Interface: standard USB Mini-B type Interface Specification: USB HID keyboard Input power: 1A 5V USB Charge Package Included: 1x Laser Projection Keyboard 1x USB Cable 1x User's Manual