There are many styles of iPad air keyboards available from many companies, like Amazon. Ebay, and the following is the keyboard made by Cell-phonecover.com.
1. Best Keyboard iPad Air For You IPK04
1. built-in wireless Bluetooth 3.0 keyboard.
2. For any fashion slim aluminum design models.
3. Micro usb universal charging interface, charging more convenient.
4. This Bluetooth keyboard can be connected to mobile phone use on the Apple iPhone.
5. Built-in rechargeable lithium battery.
6. Light weight, small sound button, waterproof, dustproof.
7. Sleep mode to save power button.
2. Cheap Best iPad Air Keyboard IPK02
There are 3 color of keyboard that you can choose.
You can find more styles of iPad air keyboards at https://www.cell-phonecover.com/shop/keyboard/.