House arrest is typically enforced with the use of an electronic sensor strapped to the offender's ankle, not removable by the subject. If the subject and the sensor venture too far from the home, the violation is recorded and the proper authorities are summoned.
Notable instances of house arrest:
People's Republic of China:
In the Walt Disney film, First Kid, Luke Davenport (portrayed by Brock Pierce) was house arrested and confined to the White House for getting into a fight with a bully. An electronic sensor was strapped onto his wrist, not his ankle. However, he used a chatroom and communicated with his mysterious online friend to seek assistance in removing the electronic sensor. He did what his online friend said and used an unknown technique to remove the electronic sensor and moved it to a dog. At the end of the film, his warrant of punishment was nullified.