Description:Name: Smart Thin Waist - Material: special material - Single pendulum: about 500 grams - Uses: fitness, weight loss - Suitable for waist circumference:(60-105CM)Function: regulate intestinal function, shape abdominal muscles, warm uterus - Product design features:Fitness machine that can massage and count - Magnetic massage points inside - Can also massage the abdomen during exercise - Counter tracks your movement anytime, anywhere - Thin waist device that will not damage the waist - Adjustable waist to prevent slipping - Advantage:Equivalent to using this product for 10 minutes35 minutes of yoga45 minutes by bike - Swim for 1 hour - Sit-ups 220Jog for 2 hours - Burn 30,000 calories Package included:1x Hula-Hoop