The tiny robot that measures less than 2cm on a side has a built in Bluetooth radio interface to control its two motors.

The little robot is capable of running for five hours on Air Zinc batteries and can move at 70mm per second when under control. We’re not quite certain how the motors in the robot actually work but Seiko Epson claims they are ultrasonic. The robot weighs all of 12.5g.

At the moment the only use for the robot is a small theatre where the ‘artist’ can control the lights, sound and movement of the robots.
More here.