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 Keyboard Material: ABS Color: White Keyboard light source: red diode Keyboard layout: Approximately .19mm bevel, size is QWERTY layout Product Size: 250mm (W)x110mm (H) Keyboard position: about 100mm keyboard device Required projection surface: Non reflective, opaque plane Recognition rate: more than 350 characters per minute Operating surface: Any opaque surface Physical size: 38mm x 75mm x 18mm Weight: About 47 grams Power supply: USB power supply, lower 1A 5V Battery capacity: polymer battery, maximum 1000mAH (maximum), 3.7V battery operation Time: 120 minutes Battery charging time: 200 minutes USB interface: USB 1.1 and 2.0. USB HID version 1.0 BT: V3.0 (Class 2), HID profile version. 1.0 Frequency range: 2402-2480MHz Channel: 79 Modulation: GFSK Working temperature: about -10-40°C Storage temperature: about -20-40°C. Package List: 1 x User Manual1 x Projection Keyboard1 x Data Cable