There is no cost for the software. All you need is a decent headset (prefarable a USB headset) and your computer. Make your presentation using Powerpoint, Keynote, Prezi or another preferred presentation program. Download Screencast o Matic onto your Mac or PC (the free version will do or if you want the pro version for 120 SEK per year) The software records your screen (and if you wish) your webcam. That's it; you are good to go! Simpy, press the red button.