The small product called Wisdom 360 Android Smart Key might be a good mobile accessory and companion for those who want to add an extra button to their smartphone running Android 4.0 or above. Designed like a 3.5mm earphone connector, the smart key fits inside the phone’s 3.5mm headphones plug and enables quick access to one of your favorite applications.
The shortcut key works with an app that you need to download from Google Play and install on your smartphone. Within the app you can set the app you want to open as you click the tiny button, as well as other features such as the type of click that should open your favorite app (single click, two clicks, etc).
Each pack comes with 6 shortcut keys held in colored attachments so you can keep them on your earphone cable and use it whenever you need.
With the one-click shortcut key you can enable extra button functionality to your phone and instantly open the camera (useful when your phone doesn’t have dedicated camera button), web browser, email app, messaging app, or other Android applications.
The pack of 6 smart keys is available for purchase at Chinavasion for $9.99.