Low battery detection.Inbuilt 3D sensor to calculate the approximate amount of calories and fat you would have burned.Intelligent step filter function that ignores movement that is not running or walking.Compatible with windows xp.Compatible with windows xp and greater mac not supported This handheld calorie and fat counter from pyle is a great way to stay on top of your workouts. The intelligent 3D sensor counts your steps while walking, jogging, or running and uses that information to calculate the approximate amount of calories and fat you would have burned. The intelligent step filter function ignores movement that isn’t running or walking, so you know the numbers are accurate. This device also displays the exercise time and total distance. You can even connect it to your pc using the built in usb connector and view your workout data on your computer.