<p>Item Type: Lung Exerciser Expander DeviceMaterial: Silicone, ABSGross Weight: 75g \/ 2.6ozProduct Size: Approx.5 x 10cm \/ 2.0 x 3.9in</p> <p> .wang-edit-text{</p> <p> font-family:'Arial' </p> <p>important;</p> <p> }</p> <p> .wang-edit-text table {</p> <p> border-top: 1px solid </p> <p>000;</p> <p> border-left: 1px solid </p> <p>000;</p> <p> }</p> <p> .wang-edit-text table td,</p> <p> .wang-edit-text table th {</p> <p> border-bottom: 1px solid </p> <p>000;</p> <p> border-right: 1px solid </p> <p>000;</p> <p> padding: 3px 5px;</p> <p> }</p> <p> .wang-edit-text table th {</p> <p> text-align: center;</p> <p> } 1Endurance Improvement: Breathing muscle trainer, improve aerobic exercise endurance, and enhance muscle endurance. 2Increase Lung Capacity: This lung exercise dilator can help you adjust your breathing and increase vital capacity during exercise. 3Improve Physical Function: This breathing trainer can help improve shortness of breath and palpitations, and improve physical function. 4Adjustable Resistance: This lung capacity training device can adjust the resistance according to the needs, and it is easy to use. 5Portable: This breathing training device is easy to carry, compact, lightweight, easy to clean, and no burden for sports.</p>