Removable Design | Easy to Clean | Replaceable Steel Balls. Breathing Sport Exercise Device: Continuous exercise will have a better effect. It is recommended to use it for 5-10 minutes, 2 times per day. Natural Breathing Exerciser Suitable for Most People: Equipped with 15mm/16mm/18mm steel ball with different resistance. Help to Mucus Removal: Vibration of the airway by expiratory pressure to loosen mucus from the airway walls. Lung Exerciser: The device exercises the lung's exhalation muscles to enhance lung capacity and improve breathing.

Best Sellers Rank: See Top 100 in Health & Household. : B0BRTZBT2T. Manufacturer: TyeinGo. Date First Available: April 4, 2023. Product Dimensions: 2 x 2 x 3 inches; 4.16 Ounces. Is Discontinued By Manufacturer: No.