Installation Guide: 3M™ One-Piece GPS (TD4i) Offender Tracking System and Curfew Unit
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2
Main Components
The One-Piece unit features the following main components:
Figure 1: One-Piece GPS Unit Main Components
2.1
LED Indicators
The One-Piece unit features three LED indicators that inform the offender of the unit’s status. If vibration
notification is enabled, the One-Piece unit vibrates in order to prompt the offender to check the status of
the LEDs.
The three LED indicators are labeled as follows:
PWR
GPS
Zone
Activation Button
LED Indicators
Charging Port
Pin-Tray Bracket
Fiber Optic Strap
Zone
PWR
GPS
