If you have already tried Interact-AS and want to purchase a permanent unlimited use license of Interact-AS software outright. The Professional Edition is for a single PC computer and comes with unlimited speaker accounts, free software upgrades and unlimited technical support for one year. Requires a PC computer with 4 GB of RAM and i5 processing speed or faster. Will not run on a Macintosh. Comes with a software DVD, one headset, USB sound adapter cable, and printed Interact-AS Quick Start Guide. Quantity pricing available when purchased at one time: buy 4 licenses and get 1 free; by 8 and get 2 free. District-wide licenses are also available (please inquire). Pricing based on total students in district.