The world of security equipment supply is considerably vaster than what most people would think. For instance, many people think there are only two or three types of audio recording devices outside of traditional tape recorders. Moreover, they wouldn’t assume that they have much to do with private security. Audio recorders, after all, are the tools of lazy college students. However, they’re also excellent for monitoring areas with compromised security or recording the results of an experiment. They’re perfect for anytime that someone isn’t in a room, but has to hear what was going on in it. Modern audio recording devices have long recording times, and their recording medium usually involves high quality MP3 files. Nevertheless, they do make a great gift for college students who have a reason to record lectures.