How do I know if my WaterRower model is Upgrade Package compatible? April 28, 2020 22:14 Updated The Ergatta Upgrade Package is only compatible with wooden frame WaterRowers that have an S4 monitor. The WaterRower Model Identification hub can help you determine your exact model. Related articles Do I need a Commodule to use the Ergatta Upgrade Package? I already have a mounting arm and a personal tablet - do I need to buy the whole package? What happens if I cancel my subscription? I already have a Commodule. Should I still buy the Ergatta Upgrade Package? What are the tablet specs?