Penal Code § 1210.9

(a) A continuous electronic monitoring system may have the capacity to immediately notify a county probation department of violations, actual or suspected, of the terms of probation that have been identified by the monitoring system if the requirement is deemed necessary by the county probation officer with respect to an individual person.

(b) The information described in subdivision (a), including geographic location and tampering, may be used as evidence to prove a violation of the terms of probation.