Upgrade Features
The Zire 31 offers the following improvements to the Zire 21:

• Color display (versus the Zire 21's monochrome screen)
• 16 MB of Memory (versus the Zire 21's 8 MB)
• MP3 digital audio capability
• Palm OS 5.2.8 (versus 5.2.1 for the Zire 21).

Display
The Palm Zire 31 features a 160 x 160 color STN screen that displays thousands of colors and features contrast and brightness controls.

Audio
The included RealPlayer for Palm OS enables you to listen to MP3 music files stored on optional expansion cards via the built-in speaker or optional headphones/ear buds. RealPlayer for Palm OS makes it easy to transfer your personal MP3 music collection to expansion cards and organize your songs by creating and editing playlists right on your handheld. It also offers an auto-dimming capability to help conserve battery power.

Connectivity and Expansion
The Zire 31 uses Multimedia Card and Secure Digital expansion cards, which instantly add software applications, additional memory, large databases, and more without taking up built-in memory space. You can synchronize to your desktop PC via the mini-USB connection on the side of the handheld.

Operating System and Software
The Zire 31 is powered by Palm OS 5.2.8, which provides higher performance, enhanced multimedia features, and enterprise-class security. It useses the intuitive and easy-to-learn Graffiti 2 writing software to input data into the handheld (as well as an on-screen keyboard). Windows users can synchronize calendar, contacts, tasks and notes with Microsoft Outlook.

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The Palm OS features the following organizer applications:

• Contacts: Lets you store several addresses for each contact, and it adds new contact fields for more phone numbers, multiple email addresses, instant messenger IDs, and a website for your contacts.
• Calendar: Use the new Agenda view to see upcoming calendar events, tasks due and important email, and color-code your events to provide an easy way to reference your Calendar in the Agenda, Day, Week, and Month views. Take more notes, or synchronize more details from your desktop, into the larger Memos and Notes fields on the handheld.
• Tasks: Use tasks with alarms and repeating tasks to set reminders for important comments.