From
Microsoft site
This version includes updates for known performance issues, and adds exciting new features:
* Pan and zoom capabilities for embedded graphics
* Screen rotation capability between portrait and landscape modes for more natural, comfortable reading (Windows Mobile 2003 and above)
This version of Microsoft Reader for Pocket PC (version 2.4.1) is compatible with:
* Pocket PC 2002 and Pocket PC Phone Edition devices
* Windows Mobile™ 2003 based Pocket PC and Phone Edition devices
* Windows Mobile 2003, Second Edition based Pocket PC and Phone Edition devices
* Windows Mobile 5.0 based Pocket PC and Phone Edition devices
* It is not compatible with Windows Mobile-based Smartphone devices.