The perfect combination of fitness and play! With the Ergatta upgrade kit, you can upgrade any WaterRower S4 rowing machine with a tablet arm and 17" touch screen. The tablet arm is available in all types of wood, so it fits perfectly with the WaterRower. The extension kit attaches to the top of the tank unit and folds away with a simple movement of the hand. just the beginning!Ergatta membership (available with annual or monthly subscriptions) opens up a new world of rowing training, offering thousands of personalized and gamified rowing workouts for all fitness levels.Ergatta promises motivation and interaction, as well as the joy of being a be a part of a global rowing community. For training, you can choose between head-to-head races or single and multiplayer training, where you'll be sure to get the most out of your WaterRower. There are life courses or scenic lines, on-demand races, new weekly workouts and monthly challenges Ergatta software is constantly updated to ensure user interest is maintained Note: Not compatible with SmartRow.