What's included: Bluetooth Wireless Virtual Keyboard, Mini USB Charger Cable, User Manual, Specifications: Keyboard light source: Red laser diode Keyboard layout: About 19 mm tilt, QWERTY layout Keyboard size: 100 x 240 mm Projected keyboard location: 100 mm distance from device Required projection surface: Non-reflective, opaque flat surface Detection rate: 350 Characters per minute Operative surface: Any flat surface External power source: USB power / less than 5V 1A Power source: Built-in Li-polymer rechargeable battery Battery size: 1000mAh Battery working time: 200 min Battery charging: 120 min Frequency range: 2.4GHz Compatible: Windows XP / Vista / 7 / 8 / 10+ Windows Phone 7, iOS devices, Android 3.1 and higher, MAC OS X