we have detailed user manual and operation video for you reference, we also can supply online face to face training,if you need 15 inch color touch screen, it is more convenient to operate. suitable any ages and any parts of body: face, whole body and vaginal.with a special transmitter, high energy focused ultrasound from the skin surface conducts to the smas layer. one time treatment can get instant result the amazing result will be seen after two months. it can be kept for 2-3 years. non-surgical treatment: no wound, no pain, no anesthesia in the whole treatment process.more comfortable treatments..syi