Built-in MP3 player. The Xonix also plays Windows Media Audio (WMA) files, and WAV files.256MB of storage
At least my model has 256MB. The capacity of Xonix MP3 watches ranges from 32MB to 256MB. (There's a table below that shows how capacity actually relates to music quantity.)
Portable hard drive
The Xonix MP3 watch stores more than just MP3s. You can copy any file that will fit onto the Xonix and use it as a backup device.
Built-in voice recorder
There's a microphone built in next to the headphone jack that allows you to record up to 18 hours of voice notes. Listen to this sample recording to get a better idea of the quality.
Simple analog quartz watch
It's not fancy, but it does its job.
Multiple equalizer modes
Choose between pop, rock, jazz and classical.
Built-in 2.5mm headphone jack
You won't be using your Bose QuietComfort headphones with this watch without an adapter, but 2.5mm is still a standard size, often used for things like phone headsets.
Built-in USB 1.1 jack
The Xonix MP3 watch actually has a short USB 1.1 cable and jack tucked into the rubber strap (the watch comes with a USB extension cable for less accessible USB ports). The USB cable is used for both recharging and data transfer.
Five hour battery
This is no exaggeration. I tested the battery and found it lasted almost exactly five hours. It takes about two hours to fully recharge.
Automatic power off
Stretch that five hours out as long as possible. When the MP3 player is paused, it will automatically shut off after two minutes. It will also shut off two minutes after all the tracks on the watch have played, just in case you've fallen asleep.
Upgradable firmware
Firmware is software that runs in read-only memory and usually manages specialized and relatively simple devices. As the name implies, it is somewhere between software and hardware. You want firmware to be upgradable so bugs can be fixed without having to replace the hardware. The process of upgrading the Xonix MP3 watch's firmware is very simple.
Sequential and random modes
Either play tracks in order, or let the watch decide what track you hear next.
Simple file management
When you plug the watch in to your computer, it gets mounted just like an additional drive or volume (Mac) as though it were a digital camera or a portable memory card. Once the watch has been mounted as another drive or volume, just drag and drop or delete MP3s and other files from Windows Explorer or the Macintosh Finder. (After deleting files, be sure to empty your trash so that the files are actually removed.) You can also delete tracks and voice notes from the watch itself.
