As the top model of the folding series, the F85 treadmill offers a 4.0 Cont. Duty HP motor with output and performance second to none. The F85 also incorporates the largest deck that SOLE offers, an exceptional 22" wide running surface that is comfortable for any runner. Just press a button and take your stride to speeds up to 12 mph and inclines up to 15-Percent. This model has six standard programs, two user customization programs, and two heart rate control programs. Other features include a low-noise, shock absorption Cushion Flex deck, our longest commercial sized belt, and low profile running hood. It also comes with speed and incline controls on the handlebars, built in cooling fans for comfort and a sound system for any MP3 player, iPod, etc. As will all SOLE folding models the deck locks into place when not in use, 100-Percent secure.