For the first time ever, using Bluetooth Smart technology, you can connect your dartboard wirelessly to a smart phone, tablet or other device via the Viper Darts Linkup app. This revolutionary free new app will allow you to keep track of all your scores with a customized profile that will save your progress and measure your darting stats. The free Viper Dart Linkup App is launching with 16 games available with many more to come. The Vtooth has a regulation 15.5” target face, so you can practice on the same size board as the pros. The Vtooth features Target Tested Tough segments that will stand up to the toughest punishment, in addition to an ultra-thin spider to minimize bounce-outs. Furthermore, the Vtooth features concave segment holes that lock in your shots. The multiplayer feature supports up to 4 players, so no one is left behind. Embrace the new technological revolution in dartboards with the Viper Vtooth!