Never break your stride with the Sunny Health & Fitness SF-T7515. It lets you stay connected with Bluetooth and MP3 technology. This Sunny Health & Fitness treadmill is packed with state-of-the-art technology that will keep you engaged and connected. The large backlit LCD Monitor displays time, distance, speed, calories, incline and heart rate. It’s equipped with 12 preset interval programs that manipulate time, speed and incline. There are 3 countdown modes on this workout treadmill to target specific workout goals: Time, Distance and Calories. The user integrated Body Mass Index calculator will estimate body fat based on height and weight. BMI is a reference point for users to determine goals and fitness progressions when taken in different stages of training. Integrated speakers, microphone, Bluetooth and MP3 connectivity allows you to answer calls and listen to music. The ample running space lets you run up to 8 miles per hour (12.87 kph).