Black 500W Portable Folding Electric Motorized Treadmill Running Machine. If you have little time to go the gym, go running, or are prevented from running due to bad weather, this is the solution. With this treadmill, your home is your gymnasium that will help you stay in shape. It features a multi-function display so you can track your progress, as well as a 500W motor, making it very sturdy, and can be folded manually. So buy this 500W Portable Folding Electric Motorized Treadmill Running Machine (Black ) for $175.95 after instant rebate with free shipping at Rakuten.com.