The Pololu Zumo Robot is a dual motor rubber tracked robot that fits inside the 10cm x 10cm rule for Mini Sumo Robot Competitions.
The Zumo Robot shield comes with a buzzer that can be used to signify events or actions.
The Zumo Shield libraries provide basic motor operation consisting of PWM speed control and direction.
The Zumo Robot Shield can be fitted with a Reflectance Sensor Array that allows it to solve different line/maze style problems.
The Zumo Robot is fitted with a set of Inertia Sensors that can be used to detect collisions and determine bearings/direction. The later 1.2v of the Zumo Shield includes a Gyroscope.