Features 1. Plastic artifact, belonging to the family fitness apparatus, can help the abdomen/arm/legs to exercise and massage. You can adjust to tighten and strengthen your muscles.2. Strength adjustment, 4 steps can be adjusted, can be used in the gym with morning running3. EMS Anti-micro-electricity, electric muscle stimulation through current4. A high-grade soft PU gel pad with three veneers, two legs or arms.