• great device and feature set abs for abdomen/arm/leg training, body for body partial exercise or massage. adopt different levels of intensity from warm-up to high-intensity. • high technology adopt ems. can help to tighten and strengthen your body muscles. 20 minutes of using per day is equivalent to 2000m running or 40 minutes of sit-ups, saving your tim. • usb charging the exercise apparatus uses usb charging and the exercise intensity of the machine increases by 50% than the similar products. the battery life of it is very long and it can do continuous physical exercise more than 60 times by charging only once. • easy to use it's super light, ultra thin, wearable, and convenient to carry on. designed with ergonomics targeting abdominal muscle exercise. fix the fitness gear to the position where you want to strengthen your muscle.