Granboard 3s, developed in Japan, the hotspot for soft tip darts. Granboard offers the largest online community in the world. Choose your opponent and challenge them to a match, whether they're waiting for you in Tokyo, New York, Madrid, Amsterdam or Berlin. Video and audio broadcasts can be turned on and off via a tablet or smartphone, see and talk to your opponent if you like, find darts friends in the Darts World community. Free app - Android and iOS for tablet and smartphone. Connectivity via Bluetooth 4.0. A micro USB port on the Granboard 3s can be used to provide a power supply for the super cool LED lighting on the outer ring of the board.