The iFind is the World's Only Battery-Free Item-Locating Tag

 - May 28, 2014
References: wetaginc & gadgetsin
Item locaters and phone finders are not always reliable due to their short battery life. However, iFind can help you find your most prized possessions quickly, efficiently and most importantly, without any energy use.

The iFind is the world’s first battery-free wireless tag and it's completely bulk-free, which allows for you to have it on you at all time. It only measures 1.25 x 1.06 x 0.09 inches and comes in a vibrant array of colors. It also comes with a custom hole so you can you can easily attach it on your keychain, bag or anything you need to keep track of.

The tab works by recycling electromagnetic energy and then connects to an app via Bluetooth to easily keep track of your items. And if you can't find your phone, just shake the tab and it will automatically call it for you.