TILE is the amazing thing to discover your lost things. Most of the times we forgot things like keys. We spend lots of time to discover keys. TILE is the way to resolve this. You can attach Tile to your key, your bag or with anything. You can locate your stuff with the TILE through iPhone 4S, iPhone 5, iPad Mini, iPad 3rd and 4th gen, and iPod Touch 5th gen.
It comes with very genuine and reasonable cost $ 18.95 USD for 1 Tile for 1 year.
If you want to preorder Please check this link
1) No need to charge TILE. No battery backup needed.
2) The Tile app saves the last GPS location it saw your Tile.
3) Tiles come with a built in speaker so you can easily hear it in close range.
4) You can see yourself getting closer and further away from the Tile when within a 50 to 150 ft range.
Limitations/ Lack Points:
1) Not compatible with Android phones.
2) Annual Cost/ No one time cost.
3) Range Limitation 50 to 150 Ft.
To know more check http://www.thetileapp.com/
or Discuss here.