Features: This projection keyboard will work via Bluetooth HID. connection to main devices, like Tablet PC, Smartphone, Desktop 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 Features 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. ***With a display screen(compared with KB580) Specifications: Keyboard layout:19mm tilt QWERT layout Project surface:any solid surface Position:from the equipment 80mm Power supply:USB supply/less than 5V 500A Battery capacity:600mAh(MAX) 3.7V Bluetooth:V 3.0 HID Profile Ver 1.0 Charging time:about 90 mins Size:78*40*20mm Frequency range:2402-2480MHz Recognition rate:400 words/min Battery time:about 120 mins Keyboard size:100mm(H)*240mm(W) Weight:60g Light source:Red Channel:79 Modulation formats:GFSK Operating temperature:0~35C 95%RH Storage temperature:-5~35C 90%RH Material:ABS Color:White,Black key word:virtual keyboard,laser keyboard,bluetooth keyboard,projection keyboard,ABS