There are special requirements for electric scooters, unicycles and the like to be used legally in Norway.
For legal traffic, the vehicle's characteristics will be within the legislation dealing with "Small electric vehicles". This means a maximum speed of 20km / h + 10%, where the speed limit is set by the manufacturer.
Seat is also not allowed on electric scooters, and the maximum length must not exceed 120cm.
Requirements mentioned here are not a complete list, and is valid for Norway. Be up to date on your country`s laws and requirements.