A manual gearbox, also known as a manual transmission or stick shift, is a type of transmission used in vehicles that requires the driver to manually select and engage each gear. It consists of a set of gears that are engaged by shifting a lever with your hand from one position to another while driving. This allows you to control the speed and power of the vehicle as well as shift into different gears for optimal performance depending on road conditions, terrain or traffic. Manual transmissions require more skill and attention from the driver than automatic transmissions but can offer better control and efficiency in certain situations.