Imagine jabbing tiny keys with chubby fingers in the name of a portable keyboard. The I-O Data Bluetooth keyboard is that and more, designed to be a suitable partner for a mobile phone or PDA, the device is too small for comfort. It measures 6 by 3.6 inches and only half an inch thick, leaving very little room for your fingers to glide over it contentedly. Their $150 price tag on the Japanese market doesn't help their case either as rivals (and more practical) are more affordable than that.

Source