Pro Flo 4 Tablet

Does the Pro-Flow 4 need (a proprietary) one? I would think it would be bluetooth or USB for sure? I have a Pro-Flow 1 and it has an RJ11 (phone style) connector. Does the Pro-flow 4 have one? It looks to be a standard Android tablet. Try craigslist or Goodwill. Dont get an $$ Ipad, probably not compatible.