Certain states and localities may prohibit the use of two earpieces or two-piece headsets while operating a vehicle on public roads. Please check and follow all applicable federal, state, and local laws and regulations regarding the use of electronics, ear pieces and headsets before operating your vehicle.
One speaker can be disconnected very quickly to comply with those states that allow speaker use in one ear only while riding on public roads.
Links below provide information state by state:
There are no restrictions for "off road use" of in helmet headset.