4 handle em slim muscle rising up fat down stimulator machine,increase in muscle mass up to 33%. each session is a 30 minute treatment on one particular area of the body. if you're working on multiple body parts, like the abdominal and the buttock areas detailed and humanized design interface with different age groups,that will require two 30 minute sessions. spaced two or three days apart for optimal results. guts and butts.em slim is particularly effective on stubborn fat deposits in the abdomen and buttocks which are often the areas most frustrating for those seeking to improve their body shape saving time and effort, only lying down for 30 minutes = 30000 muscle contractions (equivalent to 30000 belly rolls / squats).syi