Features: Jump up and down during your workout. Its vibration frequency show you the stability and performance of your exhaled flow during exercise. The pressure can be adjusted according to your lung capacity, age and current health status, suitable for a variety of people. Clear your airways with OPEP Therapy, a portable lung exerciser that sends vibrations through your airways to effectively loosen stubborn mucus build-up on airway walls. It easily clears mucus from your system when you cough and also helps expand your lung capacity, clear your airways and enhance your breathing. Portable and easy to use, you can take this lung health device anywhere. The mouthpiece can be replaced for long-term use. Material: plastic colour: blue Package Contents: 1 x Breathing Vibration Sputum Ejector 1 x Tape 2 x Steel balls Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.