The Caddie Chip is a small device the size of a poker chip. By pressing a button on the Caddie Chip it sends via Bluetooth a message to your phone and your phone will use it's voice to tell you the remaining distance to the hole. The free app that you download onto your phone will show an aerial view of the fairway and display your position on that fairway. By moving your finger on the screen you are able to see distances to hazards.