Equivalent to 5 exercises (22-31 minutes). The LCD screen has clear letters and symbols. Suitable for belly sizes from 70 cm up to 130 cm. Removable plate. Mercury-free electrodes made from conductive carbon materials. When you can't do abdominal exercises anymore, you can use this perfect belt to make your muscles stretch as tight as you would if you were exercising. Even if you suffer from back pain, using the Beurer EM30 Belt, you can tighten abdominal muscles and rest at the same time, and the belt offers intensity that can be adjusted to its five training programs, allowing for variety.