I purchased 2 of the plug ins that were supposedly saves you money on Xcel bills. Yeah right , they took my money and I never received anything from them. I should have known better. Really *** me off that I fell for such a product. They need to be in jail for stealing my money and only God knows how many other people's money. Grown men unwilling to work for a living and create some bogus crap basically trash to rip people off. How sad is that? User's recommendation: Absolutely a scam don't buy nothing from them ever.