An easy to build chassis kit with all metal construction. Supplied with four motors with wheels, and everything you need to build the frame. Multiple mounting points make it easy to mount your favourite sensors, such as the Ultrasonic Sensor. 4 x AA batteries are available separately to get your 4WD robot in action. Included: 1 x Metal chassis 4 x Motors 4 x Wheels 1 x DC switch 1 x 4AA Battery holder Assorted mounting hardware