The hand grips can be effective to strengthen your force of hand and forearm. For the HG 2322, it can tell you accurate exercise count; it has aptitude cartoon show and sleeping function that make your exercise more interesting and can save power. For the HG 2323, It can tell you accurate data of your exercise count, time and calorie consumed; it can memory the accumulative total count of a month or a week which can help you master your achievement and finish your goal. The pitch between the handles can be adjusted to adapt your hands