Communication hub between the track director, remote controllers, in-car flagging units, and LED signboards. More channels allow higher information loads (more cars, more signboards, more data). Best mounted at a high, open location with line-of-sight to the track and other broadcasters β compatible with the Flagtronics 20ft aluminum extendable pole and an optional recharging solar panel. IP67 weather-rated with an internal rechargeable battery.