Tone and firm abs any place with the ABS NRG ab training belt. No need for traditional crunches. Each session is just 23 minutes. Utilizes electronic muscle stimulation. Muscles contract as they would during exercise. You can wear it while doing virtually anything. Technology: EMS (Electrical Muscle Stimulation). Functions: Muscle training toning and strengthening of abdominal area. Uses a CR2032 battery. Includes: Storage sheet. 6 Gel sheets. Protective case. Support belt.