EMS is a technology that uses electrical signals to directly stimulate and exercise the muscles. Easy to attach and ready to operate at a single touch, comfortable and cordless EMS training.Training gear to wear. Pad to train the waist, arms, legs. The Abdominal belt is super light, ultra thin, convenient to carry on, abdominal exerciser can be worn unobtrusively under your clothes. You can use this EMS ab trainer anytime, anywhere. It’s super light, ultra thin, WEARABLE, and convenient to carry on. Each machine requires 2 AAA batteries, we do not provide batteries, you need to buy it separately.