First-class, app-controlled abdominal back trainer. The Compex CoreBelt 5.0 offers 9 app-controlled muscle stimulation targets for the abdomen and lower back separately and simultaneously, including 1 massage and 1 relax.The Compex CoreBelt 5.0 abdominal and back muscle trainer can help you reclaim your waistline with 9 targeted programmes. The app-controlled muscle stimulation for abdominal and back muscles helps you tone and strengthen your core. The CoreBelt 5.0 also has a massage and pain relief programme so you can relax and ease your discomfort after a busy day. Size L/XL: waist circumference 85-114 cm.