I don't think I really know what he means by a jail, but electronic monitoring is intended to communicate the whereabouts of an offender. If it means that when an offender leaves his home when he is not supposed to leave home, his officer finds out about it immediately, then I suppose it could be construed somehow as a jail. But there are no bars. The offender can simply walk away and suffer the consequences from his probation officer.
On May 15th, 2012. See this statement in context.