The models you find at Cicli Mattio are pedal-assist bicycles: the motor is an aid, but if you don't pedal, the bicycle remains stationary! Pedal assisted bicycles require a push from the pedals to start the motor. The maximum power of the motor, as stipulated by Italian law, must be 250W (0.25kW) and the maximum speed attainable must not exceed 25 km/h.