Fintie Ultrathin (4mm) Wireless Bluetooth Keyboard for iOS (Apple iPad Mini 4, iPad Mini 1/2/3) Function Keys for iOS, 7-Inch Black Compatible with Apple iPad mini 4, iPad mini 1/2/3. Function key is designed for Apple iOS only not compatible with Android system 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: 7.9"L x 4.9"W x 0.2"H (200mm*125mm*6mm)