The original instrumentation was for violin and piano (with optional luthéal attachment).

It drives the mower blade(s) (and sometimes optional attachments).

Its optional attachments keep the light on up to 10 minutes and provide a separate switch to turn on the Genie's light without opening the garage door.

An optional attachment, the Heatguard, attaches to the wall behind the range and can detect a burner that is left on without a pot on it.

Whisk An optional attachment made from strands of flexible wire, designed specifically for whipping light batters.

Although I am, of course, the perfect life form just as I am, I rather wish I could have come with those as optional attachments.

A special large-hole screen and a grain mill are optional attachments.

There are also optional attachments that will allow the NCR 3170 to receive short electronic messages sent to wireless digital beepers.

Perhaps the portables' slickest feature is an optional attachment called the Readydesk, a $149 device that weighs less than a pound and attaches to the back of the computer.

After the deck is removed, the company's line of optional attachments and add-ons are a breeze to integrate.