I took my time to read all the comments, sry for my average english.... paranormal investigator, criminal investigator, but no eletrician or arduino geeky nerdy guy ? Here i come :D _Screen Audio Display Spectrum Analyzer = ebay~80$ (easy to found) _Noise-Sound Audio Sensor = ebay~2$ _AM Dynamic noise limiter = ebay~10$ _RF Low Noise Amplifier Module Gain = ebay~12$ _Guitar Loop Pedal Board-True Bypass= ebay~20 to 80$ _etc...... _etc...... i can continue for a long time the point is i build EVP, AMF, Am radio receiver etc for my companion who she's into this kind of stuff i generally do my research on other guy like me that build their own stuff more accurate and more easy to do some maintenance on it or tweaks, and in my opinion Mr.Huff i'm sure he's a nice guys but he's also a good electronic craftman and anybody with a basic understanding of elec can do the exact same box for 1/6 the price he sell them !!!!!! fraud or not i don't know, what i do know there is there is no more than 800$ worth of electronic components max. now for my opinion this guy is a fraud on one thing he tweaks the results on his "spirit box" pretty easy to do with arduino driver controller even on a autonomous battery or even the analog way ^^ with good old feedback delay or echo effect mix with the other device i mention u can make like voice came out straight from *** so nice craftsmith but not very nice human. hope that will help some people who does rly like real equipement for paranormal investigation and not snake oil device. u can do it for real and not bisness purpose (fake results because not the natural use of a measurement device) . quote Mr.huff huff pass http://huffparanormal.com/buy-a-portal/ "This introductory price is not cheap, at $3995 shipped within the USA, and the permanent price will be even more expensive at $4595 once these three sell. Why so high? For a few reasons. One, this cost me over $2000 in parts alone to make, as I spare no expense in any area from cables, to materials, to parts. They take 2-3 weeks of my time, which means 2-3 weeks of work, and well, this is time that is taken away from family, my main career and business and this is my invention/creation that I have poured my blood, sweat, tears and tens of thousands of dollars into during research and development. Second, I do not want these in the hands of everyone, as it is a serious tool for connecting with and conversing with the dead. The spirit realms. Without experience, one can tap into things you may not like (be sure to see the disclaimer below) or maybe nothing at all if you are not open to receive communication. I would never want my device to be mis-used so I only offer it to serious people who have done this work before. Those who are serious realize how important and life changing this device is, and can be. We can now connect with, and talk with THE DEAD. Clearly. How does one put a price on this?