Sena Bluetooth SMH5 v1.3 User's Guide - Manual (Page 33)

SMH5
34
WARNING
Sena informs that using this device in public traffic may not be
authorized by the law. Please check your local law and use this
device only out of public traffic such as private properties or closed
circuits. If the simultaneous use of both ear speakers while riding a
motorcycle is prohibited by your local law, please use only a single
ear speaker while riding. Sena denies any liability should you choose
not to respect this warning.
Using the headset with loud volume may be harmful to your eardrums
and cause hearing loss. Please maintain proper volume level to
protect your ears.