There are several items included in your e bike conversion kit. Besides the motor/wheel assembly and controller there are a few more options to choose from such as display, throttle, Pedal Assist Sensor, freewheel.
You will need a type of display for e bike, either LED display or upgraded LCD display, to power on your system. You have the option to choose your preference of throttle. A twist throttle is identical to those on motorcycles and thumb throttles can be operated with only a finger rather than the motion of your hand.
Overtime, if the user is tired of using the throttle, they are given the option to pedal as if it were a regular bicycle. All you have to do is install the Pedal Assist Sensor. However, the motor is required to have the power-on-demand feature.