Feature: 1. Unique styling, portable and compact, you can take it to any place. Lose weight effectively. 2. It offer three steps: weak, medium and strong, you can adjust it according to your situation. 3. This device help you to adjust the way you breathing , so you can relax yourself and exercise the muscles around the mouth, cheeks and abdomen,and become slim finally. 4. Reduce breathlessness and increase lung capacity by strength-training your respiratory muscle. 5. Use it 5 minutes a day(equal to 30 times’ breathing). Simply to used. Specification: Material: ABS Size: about 4.6*11cm(L*H) Weight: 14g Color: Blue Method of Use: First, including props in the mouth, to breathe in and out to make the abdomen convex and concave. Second, adjust the amount of air in the air on the front section of a small prop according to your own state. Third, clean it after use. Package List: 1 x Abdominal Breathing Device Note: You need to wash it every time after you use. Do not hard to pull or force to use hard to avoid damage.