Leading 5000ml Capacity: This device offers a maximum capacity of 5000 milliliters (5 liters), providing a broad range for lung capacity measurement and supporting lung health assessment. Enhance Breathing Techniques: Practice slow, deep breathing exercises to help improve oxygen flow and support lung expansion. Flow Rate Indicator: The indicator helps guide breathing pace. If the indicator rises too high, you are inhaling too quickly. If it remains too low, you are inhaling too slowly. Aim to keep the indicator in the middle range for steady, controlled breathing. Track Your Progress: Monitor respiratory performance with consistent measurements and a wide capacity range to support goal setting and progress tracking. Flexible tube and mouthpiece allow for comfortable positioning during use. The device is easy to clean and includes built-in storage for the tube and mouthpiece. Color: Transparent Material: Plastic Package Contents: 1 x Breathing Exercise Device Note: Light reflection and different displays may cause slight variations in color. Measurement may vary by +/- 1-3cm.