The Woodway EcoMill The Woodway EcoMill is a great gimmick for environmentalists who want to stay fit. It will also save on power bills for the frugal. It allows you to work out indoors but stay eco-friendly. EcoMill is a unique green alternative to motorized treadmills Features - As you exercise, onboard generator system charges the battery so that the display maintains power. -It helps you to burn 30% more calories than motorized treadmills, engaging more muscles for a superior workout. - Phone or mp3 player cane charged with the USB charging station. - its an unique piece of equipment with innovative curved running surface. - The ReRev systems which converts the users kinetic motion of exercise into a productive renewable energy that can be fed back into the buildings electrical system. - This is one of the most efficient ReRev cardio pieces with each mph of speed equating to an average of 16 watt hours, a user working out at 5 mph would produce 80 watt hours.