The pan/tilt is actuated by hobby servos via chain drive. The servos are controllable with the standard PWM signal from hobby radios and many micro controllers such as the Basic Stamp. The pan/tilt allows for a great range of view as well as the ability to glance at the frontal extremes of the robot while you are driving. 

One of the unique features of these pan/tilt units is that the servo leads are routed down through the center of the pan shaft of the unit into the chassis of the robot platform. This keeps the wiring clean and keeps the leads from limiting the range of motion of the mechanism.

The pan/tilt unit has 140 degrees of pan range and 70 degrees of tilt range with wireless camera. Tilt range can be increased  with different cameras

Camera/Monitor Kit

Controller Display Mount and Power Pack