Developed in collaboration with Mexican artist Annabel Meagher Castro, Crass is an ugly bastardised three wheeled automated robot equipped with pyroelectric, audio and sonar sensors to detect the presence of humans in the vicinity.
The robot has the ability to recall phrases of the Caliban character from the Tempest and direct them to people in the environment. All of these phrases are insults, and Crass has no ability to listen to responses, so communication is one-directional. This is the basis for its (artificial) stubbornness.
More information can be found on the project website.