The new invention is an add-on device for conventional projectors.
This add-on device lets you scan in film negatives and slides, creating full-size images from your small originals.
Hayden sold computer peripherals and add-on devices such as disk drives.
Rather, they are add-on devices designed to convert any big-screen television set into a home theater by adding surround sound.
It allowed for additional add-on devices and common HotSync cradles.
The other problem is that teleconverters, being add-on devices, always hurt image sharpness and color quality, and they do their worst damage at large apertures.
Point-and-shoot cameras generally don't have such add-on devices, hence there is no such need.
It is an add-on device which attaches to the Game Boy Advance.
Voice recording will also be supported with an add-on device.
The inventor's machine would be an add-on device for standard cigarette-rolling machines.