Portable Smart Breathing Trainer – Rechargeable Respiratory Exercise Device with LED Progress Bar | Boost Lung Capacity & Endurance for Athletes, Runners & Fitness Enthusiasts Women's & Girls' Party Headband The diameter of these balls

The diameter of these balls is 4cm or 6cm

98in diameter

Overall dimensions: 80CM X 32CM X 108CM

Petite loaf

It is easy to assemble and use just follow the instruction

Portable Smart Breathing Trainer – Rechargeable Respiratory Exercise Device with LED Progress Bar | Boost Lung Capacity & Endurance for Athletes, Runners & Fitness Enthusiasts Women's & Girls' Party Headband The diameter of these ballsPortable Smart Breathing Trainer Rechargeable Respiratory Exercise Device with LED Progress Bar Boost Lung Capacity Endurance for Athletes, Runners Fitness Enthusiasts Product Description Elevate your training with this smart, portable breathing trainera compact, rechargeable device engineered to help athletes and active individuals build stronger respiratory muscles and improve breath control during physical activity. Designed for runners, cyclists,