LungBoost ChoiceMMed Electronic Smart Lung Trainer to Improve Lung Capacity by LungBoost

Description

Simple electronic technology make the lung training easily;Large screen display with ball jumps make the training visible and interesting;Two training mode: Endurance and strength mode make your lung training more effectively;3 free additional resistance cones provide you pressure mode up to 20 levels;The removable mouth piece design will let whole family member use one device and save money