* Other pins might be used as power supply (needing to drag some pins HIGH and others LOW by software) (or does it contain a battery)?
* There seems to be no additional button (like on Light-guns)?
* The text on the package say something like "Pour moniteur couleur" (or so - the picture resolution isn't too good) which implies that the light sensor isn't compatible with green monitors - maybe it is color only, or separate versions exist for color and green screens...?
== Pictures ==