The interface enables the system components to work together.

The interface draws on the metaphors of the product's use: Activating (turning on) a Wristag, Monitoring the Wristag, and Finding the Wristag. The interface was designed so that each of these activities required a specific modal interface.

The interface itself reflects the use of the product; for example, in Find Mode, the user sweeps the Base Unit back and forth to locate the child. The interface reflects the motion required by painting a "sonar" plot.

The interface also allows a user to customize their experience by naming each Wristag and monitoring up to four Wristags simultaneously.