Hold to open the menu, and select System.

About

Shows device and regulatory information.

Add Batter

Manually adds a batter to the device.

Units

Sets the unit of measure for speed measurements.

Tones

Sets preferences for audible tones with alerts or key presses.

Date and Time

Sets the date and time.

Language

Sets the device language.

NOTE: Changing the text language does not change the language of user-entered data.

Software Update

Updates the device software when updates are available.