Fintie 10-Inch Ultrathin (4mm) Wireless Bluetooth Keyboard for Windows Tablet Microsoft Surface, HP, Dell, Nuvision, Acer, Lenovo and Other Windows Devices Compatible with Microsoft Surface, HP, Dell, Nuvision, Acer, Lenovo and Other Windows Devices. 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 100 hours of uninterrupted usage, while auto-sleep feature saves power and ensures you get the most out of every charge. Package includes: Fintie Ultra-Slim Wireless Keyboard, USB cable, instruction manual. Bluetooth Version: Bluetooth V3.0; Working range: 10M; Size: 9.7"L x 5.9"W x 0.2"H (247mm*150mm*6mm)