Please note: This is a Sole Source Notification. TrackTech is the only US company that offers a tether (watch unit) that communicates with a smartphone to determine the location of a user at any given time. This eliminates the need for an ankle unit and provides increased mobility for the participant. This company has been in business for many years and has established a well-known reputation for customer service and cutting-edge technology. The features available to assist JR staff with monitoring and communication with the CTS and other participants, are second to none. The dashboard is very easy to use, requires little training, and offers advanced flexibility for JR staff to create tailored inclusion and exclusion zones for each participant.