The maximum amount of connected MicroBots on one device varies:
With a smartphone and the MicroBot app, you can pair up to 8-10 MicroBots(depends on the type of smartphone)
With a Prota hub, you can pair an unlimited number of MicroBots*.
* Only when the Massive mode is activated. The Massive mode is not available on Prota Pi. On a Prota Pi you can pair 5 MicroBots at a time.