There are naturally built in speakers and a 3.5″ jack that enables you to connect in your phone or mp3 gamer. Top speed is 12mph which will certainly enable you to get right into a rapid sprint. The inquiry is for how long can you hold it for? 12mph will absolutely test you if you could take care of the speed. For included stamina this treadmill uses a 2 ply belt as well as there weigh 2.75″ rollers that include stability, reduce static and also maintain the belt transforming efficiently. They additionally as a consequence increases the size of the belt life. The frame is quite unbreakable as well as is covered with safety long lasting paint. It naturally features a life time service warranty. The high torque motor is backed with a life time guarantee as well. The motor additionally has a flywheel affixed which aids in cooling it, hence lengthening it’s running life.