Complex sentence: Electronic tagging is a form of surveillance consisting of an electronic device, usually attached to a person, by law enforcement, capable of tracking the wearer's location, transmitting information about his activities, communicating with him, and perhaps modifying his behaviour.
Split into simpler sentences: Electronic tagging is a form of surveillance consisting of an electronic device. The device, usually attached to a person, by law enforcement is capable of tracking the wearer's location; transmitting information about his activities, communicating with him, and perhaps modifying his behaviour.