Are you looking compatible a professional, yet afcompatibledable vital capacity meter? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional vpeak flow spirometer must meet you needs. It is one of the best choice compatible you. Features - Color: . - Material: ABS. - Size: 15 x 5 x 3 cm. - The spirometer is a portable, hand-held device that cab measure your ability to exhale air from your lungs and provides an accurate picture of airway ventilation. - Perfect compatible Athletes and Exercise, oxygen users and asthma. - Dual flow range accurately measures compatible both adults & children. Instant readings track changes in air flow compatible detection of asthmatic issues. - Made of material compatible long lasting use. Assists detection of pending asthma attacking. - Assists in early detection of asthma attacks by accurately measuring peak flow. Packing list: 1 x Peak Flow Meter