OPUMP Smart Breathing Trainer is an advanced respiratory training device with an air flow resistance design for optimal performance. It aims to maintain and improve respiratory health through deep breathing exercises, focusing on the inspiration volume. Effects of Respiratory muscle training in Rehabilitation - Improve respiratory muscles strength 34% - Reduce shortness of breath 28% - Improve exercise tolerance 22% - Improve quality of life 19% This device is applicable to improve general health, sports & fitness, voice use, revitalization & relaxation. Suitable to chronic respiratory disease bearers for breathing exercise uses, such as COPD, asthma, and long COVID.