Features: 1.This keyboard is foldable and ultra?thin layout, aluminum alloy metal shell material, fashionable and comfortable, and it is convenient to use and carry when it is opened when not in use. 2.The keyboard has a magnetic cover, ABS comfortable scissor foot buttons, and feels good and durable. 3.This keyboard can support for ios / android / windows system, and most of the smart phones and smart tablet computers are powerful. 4.The keyboard is for Bluetooth 3.0, the working range is 10 meters, no need to worry about the distance, built?in rechargeable lithium battery. 5.This keyboard has two foldable designs, which makes it easy to carry and dont worry about it when going out. specification:Item Type: Keyboard For Bluetooth Version: For Bluetooth3.0 Effective Working Range: within 10 Meters Modulation Method: Gfsk Working Voltage: 3.2-4.2v Working Current: 1.4 Ma Charging Time: 2 Hours Lithium Battery Capacity: 120mah, Lithium Battery Sustainable Working Time: 140 Hours Lithium Battery Life: 3 Years Support System: For ios / Android / Windows Size: Approx. 85 x 313mm / 3.3 x 12.3in PackageList:1 xUSB Charging Cable1 xChinese and English User Manual1 xKeyboard