dogPACER Minipacer Treadmill SMALL-MEDIUM: This dogPACER Minipacer doggie home exercise equipment treadmill has a running area of 38"L x 16"W. ADJUSTABLE:The treadmill speed can be set from .5 MPH up to 7.5 MPH in .1 MPH increments. MOST AFFORDABLE:The dogPACER treadmill line is the lowest priced, highest value dog treadmill available on the market, because pet exercise equipment can be both reliable and economical. COMPUTER FITNESS PROGRAMS:The included pet treadmill computer comes with multiple pre-set dog fitness and exercise programs to optimize dog health and happiness for your 4 legged pal.