You've half solved your potential problem by knowledge in what someone is likely to do. The simple solution to avert that is to simply engrave corresponding numbers on CPUs and then the corresponding Bluetooth devices. Of course, the cost is probably a greater factor at this point, but still a solution to keep in mind should you ever choose to go that route. Valerie Written with Dragon Naturally Speaking 7.3. If it doesn't make sense, I probably missed a correction. -----Original Message----- Thanks. I went to the site and I'm reasonably convinced that the devices won't interfere with each other. However, since this would be in a college multi-user lab environment, I'm wondering how long it would take some prankster to mix the mice and the keyboards up just to watch the chaos. I don't think we'll be springing for the "completely wireless" configuration anytime soon, as neat as it would look. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.754 / Virus Database: 504 - Release Date: 9/6/2004