Earlier this month, the Minnesota Department of Corrections announced that it is installing an inmate-tracking system in one of the states minimum/medium-security correctional facilities. The tracking system is based on active RFID tag technology that provides alerts if something abnormal is going on, such as a fight among the inmates. In this type of a system, both inmates and corrections guards carry a proprietary RFID tag – inmates get wrist straps, guards get pager like devices – that sends out a signal every two seconds to antennas installed inside of the facility and around its perimeter. Prisoners, as well as guards, can be tracked in semi-real time.