MJ Ray suggested that I explain how the Chordite differs or is similar to the CyKey. Well enough! Under "similar" I would put: chording, unfamiliar, pocketable, one handed, wireless, battery operated. Under "different", I would say that the CyKey must be used against a surface whereas the Chordite can be used in mid-air. The CyKey works well for either hand, whereas the Chordite is handed. The CyKey uses infrared, which restricts the positioning of the device, and which restricts the devices that may be used, whereas the Chordite uses Bluetooth, which is widely supported and doesn't require any special positioning. The CyKey's infrared is cheaper than bluetooth if you already have infrared, but is more expensive if you lack it. With the CyKey, you type with your fingertips, whereas with the Chordite, you type with your knuckles. With the CyKey your thumb moves from one key to another, whereas with the Chordite, your thumb holds the keyboard and the other fingers simply move up and down; no hunting for keys. Finally, the CyKey is an off-the-shelf product whereas a Chordite (currently) must be custom ordered to fit your hand.