Leasun Ultrathin (4mm) Wireless Bluetooth Keyboard for Windows (Microsoft Surface/ Hp Stream 7 / Hp Stream 8 / Dell Venue 11 Pro/ Lenovo Ideatab Miix 2 /Thinkpad 8/ Toshiba Encore/ Acer Iconia W4/ Nokia Lumia 2520/ Asus Vivotab), 7-inch Black Compatible with Microsoft Windows RT or Windows 8 tablet such as Microsoft Surface, Dell Venue 11 Pro, Lenovo Miix 2 and other devices running Microsoft Windows. Sleek and portable, ultra-slim (less than 1/4 inch). lighter and slimmer than other portable keyboard selling in the market. Real "hard" laptop style keyboard with high end ABS material. A spring mechanism underneath each key ensures a tactile response with every stroke, helping you to type faster and with less error than on a touch screen. Built-in rechargeable lithium battery provides for 200 hours of uninterrupted usage, while auto-sleep feature saves power and ensures you get the most out of every charge. Package includes:Ultra-Slim Wireless Keyboard, USB cable, instruction manual. Bluetooth Version: Bluetooth V3.0; Working range: 10M; Size: (192mm*120mm*5mm)