Method of use:<br />1: to be contained in the mouth of props， breathing and abdominal convex， concave， each time using the 30 back (about 5 minutes).<br />2: props， according to their own state， to regulate the amount of air.<br />3: after use， please rinse with water.<br /><br />Matters needing attention:<br />1， the children can not get.<br />2， do not pull hard or too reluctant to use force， so as not to cause damage.<br />3， the use of props， please wash with water， dry storage.<br />4， do not use for other purposes.<br />Size: about 11x5cm<br />Material: resin<br /><br /><br />Reduce breathlessness and increase lung capacity by strength-training your respiratory muscles<br />Power up your lungs with a daily workout from the comfort of your armchair<br />Simply use it for about five minutes a day(equal to 30 times' breathing)<br />Small and compact， you can take it anywhere<br />It can be used by almost anyone with no side effects<br />Due to health and safety concerns， this item is non-returnable<br />Three adjustable step for your choice: weak， medium and strong<br /><br />Package include: 1 x abdominal breathing  trainer<br />Dear friends， if you have any problem， you can contact us at any time.