The software, called PC-cillin for Wireless Version 2.0, is for devices with Palm operating systems, Windows CE and Symbian EPOC.
The anti-virus software provides automatic real-time launch scanning to prevent viruses from entering a PDA through "every possible entry point"--whether via beaming, synching, email or Internet downloading.
"Since there are so many ways for wireless device users to exchange or download applications, checking for malicious code at 'launch time' is ultimately the best way to block them, regardless of how they got there," Trend Micro enterprise product manager Bob Hansmann said in a statement.
According to the Nasdaq- and Tokyo Stock Exchange-listed company, the software can be downloaded from its site and the free download is available until the fourth quarter of this year, when the next version is released.
This PC-cillin for Wireless Version 2.0 is meant for users of Palm OS 3.1 or above, Windows CE 3.0, and Psion Revo or Revo Plus (EPOC) users.
Palm users require at least 2MB of RAM and 100KB of free space for installation, while EPOC users need 8MB or more of RAM with a minimum of 200KB of memory for installation. For Windows CE devices, the software installation requires 16MB of RAM and 1MB of memory.
Trend Micro shares last Friday fell US$0.25 to US$4.65 on the American bourse.