3 Ball Spirometer, Lung Exerciser, Respiratory Exerciser, Breathing Exercise, Respirometer 3-Ball Spirometer � Your Partner in Respiratory Fitness Deep Breathing Exerciser for Comprehensive Lung Health (600cc/sec to 1200cc/sec) ? Key Features & Benefits: Effective Deep Breathing Training Three lightweight balls provide visual feedback as you inhale, helping to monitor and encourage full lung expansion. Wide Capacity Range Measures airflow from 600 cc/sec to 1200 cc/sec, catering to various fitness and recovery levels. User-Friendly Design Simple to assemble and easy to use, whether you are sitting or standing. Step-by-Step Breathing Exercise Inhale through the mouthpiece to lift the balls Hold your breath briefly Exhale slowly, allowing the balls to lower Repeat as recommended for best results Durable & Compact Build High-quality body and perfectly weighted balls for ideal resistance Premium, safe mouthpiece Flexible and easy-to-clean tubing Compact design makes it easy to carry and store Daily Use Promotes Respiratory Strength Regular use helps strengthen respiratory muscles and improve lung capacity and endurance.