Half-motorbike, half-bicycle - Austrian inventor Stefan Gulas said his creation, the "ErockIT", is a cool electric vehicle.

"ErockIT" riders have to pedal to get the bike going, and the faster they pedal, the faster the motor goes. The bike can reach speeds of up to 80 km per hour. Its inventor said it could revolutionise transport.

--Reuters

Duration: 1 min 55 sec