Calorie burner / product design

There is no need for a lady to count the number of the dumbbell's going up and down anymore, while she is exercising with it for the purpose of losing weight. Calorie Burner is a dumbbell with a metal ring on both of its ends. The ring can be rotated to set a specific number which refers to the quantity of the calorie one wants to consume. After pressing down the start button, it'll rotate back as one exercises with it. Meanwhile, the lights on both ends will show the level of calorie burnt by giving off a sequential lights ranging from blue(low level of calorie consumed) to red(high level of calorie consumed). That is the concept of letting dumbbell tell you how much energy you have consumed.