EMS technology is a technology that uses electrical signals to directly stimulate and train the muscles. Easy to connect and ready to use with one touch, convenient and wireless. Useful for stimulating arms, legs and abs. Function: according to your needs for muscle training of different parts of the body. Apply to the body part where the muscles are needed most. It has different programmings and different power levels. For those who need it: fitness enthusiasts already in good form people with back pain