I think we know that there are all kinds of iPhone accessories, and this one is the Scentee.

The Scentee is similar to the Luxi in that it fits into that headphone jack, as opposed to the Lightning port connector. This one is not designed to emit a flash, but a scent. That is right, this is made to emit a scent. In this case, it is made for rose, lavender, coffee, rosemary, and strawberry.

The purpose of this is to bring these lovely wafts of smell, and it is made to work in tandem with an Android or iOS app. For example, you can set it up to bring forth a nice smell with your alarm. Say, can I set a scent to a ringtone?

Anyway, you can read more about it here.