The motor shield is based on the L298 , it is a double complete bridge driver designed to drive inductive loads, such as relays, solenoids, DC and stepper motors.
This is a DC motor with and metal gear with encoder . It is a 6V engine with a 20: 1 metal gearbox and an integrated quadrature encoder that offers a resolution of 11 counts per revolution.
This module is based on the popular L298N H Bridge DC Motor Driver . The circuit will allow you to easily and independently control two motors up to 2A each in both directions.
This DC motor driver can be used on 4WD mobile robot platforms, combat robots, smart car competition, drive pumps, electric fans, transporters, etc ...