Check out the MOST Powerful Optimum Dual Pro unit!

The ES9800i is basically (2) ES8000i Pro units built in to 1 box with separate displays and controls .. 1 or 2 people can be done on the ES9800i .. the ES8000i can only do 1 person at a time. A whopping 5.50 Amps! USA Made w 3 yr warranty.