Inmate Tracking Unit
3M Electronic Monitoring, formerly known as ElmoTech, offers the portable group-monitoring unit TRaCEr, which is designed to monitor groups of offenders while in the field for transport to and from a facility, for off-site work detail, or for other purposes. The mobile and wireless unit offers a number of key features, including water resistance, an 18-hour rechargeable battery, handheld and lightweight design, and a user definable monitoring range of up to a 300-foot radius.