C-Ring Dumbbells Concept by Wang Zihao is Accurate Calorie Counter. Almost all of our workouts are based on approximation. By way of example a 125-lb person burns approx. 360 calories per hour if they do a vigorous dumbbell workout session. To get rid of the veil of question and talk about tough facts and figures, many of us have here the C-Ring Dumbbells. The weights sync with the smartphone or PC via USB and tell you exactly how numerous calories you burnt during your session. Color-coded lighting system displays how intense the workout is and if you need to step it up by a notch. The top part is that you just can increase the intensity by attaching more from the magnetic weight-discs to the dumbbell.