Feature:1. Virtual projection keyboard: more stable and smarter; better enhance the buyer's experience. Easy to move.2. Clear resolution: One key to turn on off easily connect to Bluetooth technology, British QWERTY keyboard layout, fast and accurate data input. The keyboard is equipped with a mini Bluetooth speaker, which supports voice reports and music playback.3. Charging: Lithium ion polymer battery, mini B type charging interface, support USB interface and Bluetooth at the same time, the connection with mobile devices is very convenient.4. Compatible with new devices: Compatible for Windows XP 7 8, for Windows Phone 7, for IOS4 5 6, for Android 3.1 and higher, for OS X.5. Fast and portable: You can take it with you. It can be placed indoors and outdoors, offices, rooms, restaurants and other places. It is a perfect helper in life. It's also a perfect gift for family and friends.Specification:Item Type: Bluetooth Virtual KeyboardMaterial: ABSColor: WhiteKeyboard light source: red diodeKeyboard layout: Approximately .19mm bevel, size is QWERTY layoutProduct Size: 250mm (W)x110mm (H)Keyboard position: about 100mm keyboard deviceRequired projection surface: Non reflective, opaque planeRecognition rate: more than 350 characters per minuteOperating surface: Any opaque surfacePhysical size: 38mm x 75mm x 18mmWeight: About 47 gramsPower supply: USB power supply, lower 1A 5VBattery capacity: polymer battery, maximum 1000mAH (maximum), 3.7V battery operationTime: 120 minutesBattery charging time: 200 minutesUSB interface: USB 1.1 and 2.0. USB HID version 1.0BT: V3.0 (Class 2), HID profile version. 1.0Frequency range: 2402-2480MHzChannel: 79Modulation: GFSKWorking temperature: about -10-40°CStorage temperature: about -20-40°C.Package List:1 x User Manual1 x Projection Keyboard1 x Data Cable