PCinsight has posted a review on the KeyGhost II Professional which is a keystroke monitoring device capable of capturing upto 500,000 keystrokes.
The key to Keyghost´s operation is an embedded chip located on the pass-through connector. This chip can store up to 500,000 keystrokes in its non-volatile flash memory and offers 128-bit encryption. If you wish to have a device which provides more storage capacity, the manufacturer does have a model to fit your needs. The Keyghost requires no battery for operation. In addition, no software needs to be installed as the embedded chip contains all of the information needed in its 8KB of ROM.Read more