Overview Portable Design: Compact and lightweight respiratory trainer for on-the-go use Lung Capacity Enhancement: Improves respiratory function and breathing efficiency COPD Support: Assists in managing chronic obstructive pulmonary disease symptoms Bite-Mouth Design: Secure silicone mouthpiece for effective training Multi-Color Options: Available in white, black, blue, and red Specifications Material: Silicone, ABS Packaging Types: Pearl bag, color box, or blister packaging variants Training Function: Breathing resistance and lung capacity improvement Packing List respiratory trainer1 instruction manual1