Features: It helps to expand and improve your lung capacity without the risk of taking many cardio and burning calories. Make of Plastic materials, Enduring and wear-resistant, not easy to break or deform, can used for long terms. The lung breathing trainer is very small and portable. With this device, you can perform your training routine wherever you are. Improve breathing strength and control performances. Increase oxygen intake and maintain endurances. The abdominal exerciser is suitable for most people who need to lose weight, such as sedentary office workers, pregnant women. Specifications: Materials: Plastic Color: Pink/Blue Size: about 10.5x4.6x3cm/4.13x1.81x1.18inch Package Includes: 1pc Lung Trainer note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.