A. The lung breathing model is designed to simulate the human lung's respiratory movements. This model serves as an essential tool for teaching and scientific research. Its compact and portable size makes it easy to carry and operate, suitable for various settings. B. Features C. - Color: Multi D. - Material: Plastic E. - Size: 13.00X7.30X4.30cm/5.11X2.87X1.69in F. - Realistic simulation: This lung breathing model accurately simulates human lung respiratory movements, making it suitable for middle school biology experiments G. - Diaphragm movement: The diaphragm movement simulation device helps students understand the breathing process by demonstrating the role of the diaphragm in respiration H. - Detailed structure: The model realistically replicates lung structures, enhancing students' understanding I. - DIY settings: The model allows for adjustable breathing frequency and depth, catering to various experimental needs J. - User-friendly: Simple and easy to use, this model is suitable for both teaching and research purposes K. Package list: 1 x lung breathing model