Breathing Exerciser: The spirometry breathing exerciser, volumetric measurements up to 3000ml help achieve optimal vital capacity and restore interrupted breathing patterns. High Quality: The breathing mouth is made of safe and comfortable PE material with ergonomic design for safe reliable use. Pipeline with good bending resistance, not affected by the patient's position Bright Color Ball: Bright color ball shape design integrated with color psychology, encourages patient training Easy to Clean: Strong and nonshaking structure, safe using and convenient cleaning. Bottom filter can keep the ball clean, care for your healthy Easy to Use: Place your mouth around breathing port and Inhale; Inhale thoroughly to lift the balls at the top; Inhale for as long as you comfortably can; Remove the breathing port and exhale properly. Repeat the process. The breathing exerciser can inhale or exhale Product description Specification: Item Type: Breathing Exerciser Material: Plastic Usage: Helps achieve optimal vital capacity and restores disrupted breathing patterns Package List: 1 x Breathing Exerciser 1 x Breathing Pipe Indications That's it