What Does Eye-Fi Mean?
Eye-Fi memory cards and devices allow for the wireless transmission of pictures or other data from a camera device. The term Eye-Fi is also used to describe the company of the same name that produces these types of cards and media devices.
Techopedia Explains Eye-Fi
With an Eye-Fi card, someone can click a picture on a digital camera and send it wirelessly to a laptop, tablet or smartphone. This solves an important problem in consumer electronics: previously, users had to hang onto USB cables or physically insert smart cards into computer ports to get the images where they needed to go. This is, in part, why smartphones started to take over as cameras – because of the significant burden of moving camera media from the camera to data transmission devices.