This is version 2 of my EM Pump. I've also upgraded the components as much as possible to get the best range. It seems to do pretty well, It registers over 200MG within 8" to 12" and can register from 2 feet or so from the top and sides of the unit. It's also very quiet and built extremely solid. Another nice feature is a built-in 9V battery compartment. It looks much more professional and I'm really pleased with the final result. All of the switches, motors and leds are 12 volts vs the normal 3 to 6 so it should be trouble free. Also, the motor is rated for 20,000 hours of use and is cushioned to isolate noise or vibration. As you can see the led output is pretty impressive, and can be used to light your way as you place your device. This is a great addition for any Ghost Hunter, and I use them on every investigation I go on. But as always I want them to look as good as they work. This has become a hobby for me and I really enjoy making them. If you are not happy with your purchase, send it back and I will refund your money within 7 days of it's delivery to you. But I don't think you will be disappointed, they are very nice. BTW...the 9volt battery is included, should save you a buck or two. I would like to hear your opinion on anything that could be improved. Also the battery fits snugly, do not try and pry it out, just tap it on your hand and it will fall out. This reduces any vibration during operation.