You can't buy this stuff at Walmart
My girlfriend and I watched this movie on Netflix the other day. I was tempted to turn the movie off several times, but wanted to see how it would end.
I loved the part where the electronic equipment was "smashed". The character exclaimed, "This stuff is expensive. You can't just buy it at Walmart". I yelled back, "Yes, you can". I wasn't entirely right, but I was close.
Laser Temperature Meter $62.12
http://www.walmart.com/ip/Raytek-Mini-Temp-Ir-Thermometer-0-To-500F/15 645206
Voice Recorder $35.99
http://www.walmart.com/ip/Olympus-DP-201-Voice-Recorder-Silver/2055162 8
EMF Meter $34.95 (Not Walmart, but most electronic stores would have something.)
http://www.lessemf.com/gauss.html