Thanks Darlene, I have the VNS for over 7 years now. Right now I am set at 2.0 amps my magnet is set at 2.25, every 30 seconds for 30 seconds. I believe what they call rapid cycling. I have had it set as high 2.75, but could barley breath when I got active. I would vomit from folding clothes, it was like running at full speed. I would pant like a puppy. And before you know I would be throwing up. I had to have the doc turn it down.... One thing though I was smoking back then too... I quit 9 months ago! Thinking about maybe trying a little higher???