Product Feature This projection keyboard will work via Bluetooth HID.connection to main devices，like Tablet PC，Smartphone， Desttop 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.without physical keyboard，small size， easy to carry， this projection keyboard can adapt to most of the working environment. Product Detail English QWERTY keyboard layout. Truly portable 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 for mobility and convenience. Compatible with latest operating systems:Windows XP&Later， Windows Phone 7 & Later，IOS4 and Later， Android 2.1 and later，Mac OS X & later.Product Specification Pattern ProjectorLight Source: RED laser diodeKeyboard layout:Approx.19mm Pitch，QWERTY layoutKeyboard size: Approx.Width:240mm，Height:100mmKeyboard location:Approx.80mm from the bottom of the device.Project surface: Non-reflective，opaque flat surface.Keyboard SensorRecognition Rate:Approx.up to 350 characters per minuteOperating Surface: Any firm flat surfaceElectrical CharacteristicsExternal Power Supply: USB Power/less than 5v 500mABattery & operating: Lithium-ion Polymer Battery，600mAh(MA X)@3.7VBattery operating time: Approx.120minBattery charging time: Approx.120minBluetooth: V3.0， HID Profile Ver 1.0Frequency Range:2402-2480MHzChannel:79Modulation: GFSK Package Include 1x Laser projection keyboard 1x Usb cable 1x User manual