Orbit is a small Bluetooth device made with anodized aluminum, which helps you keep track of your keys and phone. By attaching the small Orbit on your key ring, the Bluetooth wireless technology communicates with a free app, which can be downloaded on to your phone or tablet. When users select “Find Orbit” in the app, it will alert the user to the location of the key ring if it is within Bluetooth range.

Additionally, the app shows a map of the last location where the Orbit and phone were connected. Another feature is the Separation Alarm, which will alert the user if the key ring and the phone drift out of Bluetooth range from each other. This likely increases your chances of finding your keys before losing them for good!

Source: http://www.iphonelife.com/content/orbit-bluetooth-tracker-tags-help-protect-you-losing-things