Features: The updated version is more stable and intelligent. It is a portable wireless virtual keyboard. The keyboard is projected by laser and typed on the plane, but there is no real keyboard, only red light beam, which is cool. Suitable for IOS 4/5/6 and for Android 3.1 or later via wireless handset or tablet. Suitable for PC desktop, notebook, for IPAD tablet, mobile phone. English layout, fast and accurate data input. The recognition speed can reach 350 characters per minute. The surface is flatter and the sensitivity is higher. Comes with easy and convenient voice broadcasting function. USB charging. After full charging, the battery will work for about 60 minutes. Specifications: Light source: red laser diode Keyboard layout: about 19MM tilt, QWERTY keyboard layout Keyboard position: 100mm from the bottom of the emitter Projection surface: non-reflective, opaque surface Recognition rate: 350 words / minute Operating surface: any plane Working environment: -10~40℃/90% RH Storage environment: -20 ~ 40℃/ -90% RH External power supply: USB power / below 5V 1A Battery capacity: lithium polymer rechargeable battery 500mAH (MAX)  3.7V Battery working time: 60 minutes Battery charging time: 60 minutes USB interface: USU1.12.0, USB HID Ver.1.0 Bluetooth: V3.0 (class2), HID Profile.1.0 Frequency range: 2402-2480MHz Channel: 79 Modulation: GFSK Package List: 1 * Projection keyboard 1 * USB cable 1 * User manual