The DVR station (Digital video recorder) is available as an optional accessory for the 4th Gen players and allows the user to Record TV or other video sources such as satellite/cable box, VCR, DVD player or camcorder in MPEG-4 format.

The 604 WiFi has been criticized for its somewhat slow web-browser and lower screen quality in comparison to the 604.

Features include a 30 GB HDD, a 4.3 inch, 16:9 aspect ratio widescreen WQVGA screen, a removable battery, a kickstand, and the ability to record video and audio from line-in sources (via the optional docking station or travel adapter), or the included microphone.

It has the full capabilities of the standard 604 with the added built in Wi-Fi, touchscreen, and a web browser.

The touchscreen required the screen to have a matte finish and the Wi-Fi module adds an extra stub to the unit's side.

The Opera implementation currently lacks Adobe Flash capability or a Java virtual machine but does support JavaScript.

The side buttons have also been removed as the touch screen becomes the main means of navigation.

The processor used is reported by third parties as a Texas Instruments DM420 (a technology neighbor to the early members of the DaVinci family, the likely full name probably is DM320DM420DSC; that was seemingly only available to selected customers).

[3] A modified 704 released in France only where the integrated Wi-Fi is replaced with a TV Tuner.

[2] A variation of the standard 404, adding a 1.3 MP camera on the back to take stills images and video recordings.

While it is the only one of the series to have the camera built-in, the other players can use the "helmet cam" accessory for similar operation.

A 1" 4 or 6 GB hard drive player for music and photos without video playback.

In order to comply with the Linux license (the GPL), the source code for some of the firmware in the 4th Generation players has been released.