Apparently a mini wireless Bluetooth keyboard is better suitable to operating those portable devices than the visual keyboard. After introducing two wireless keyboards, we found the third one.
This wireless mini Bluetooth keyboard features slim design with round edges. It measures 115 x 60 x 6mm, and comes with 49 keys and built-in rechargeable battery. The maximum operating distance can reach 10m. The wireless keyboard can support various portable devices such as smartphone, iPhone, iPad, and etc.
Compared to the former keyboards, this wireless mini keyboard is relatively cheap, the price is $22.76 USD. If you need to, you can grab one from Chinavasion.