The Intercept has today published 200-page documents revealing details about Harris Corp's Stingray surveillance device , which has been one of the closely guarded secrets in law enforcement for more than 15 years. The firm, in collaboration with police clients across the U.S. have "fought" to keep information about the mobile phone-monitoring boxes from the public against which they are used. The publication reports that the surveillance equipment carries a price tag in the "low six figures." From the report: