Respironics Personal Best Low Range Peak-Flow Meter Helps Control Your Asthma.

• Measuring how quickly you can expel air from your lungs can assist you in managing your condition.
• Handle converts into a carrying case.
• Built-in flexible three-zone management system and easy-to-read numbers helps patients comply with treatment regimens.
• Color-coded indicators can be adjusted to show a patient's green, yellow, and red zones based on personal best peak flow.
• Safety mouthpieces reduce the risk cross contamination.
• One-way valve prevents patients from inadvertently breathing in air through their meters during peak expiratory flow rate testing.
• 6-1/2" L x 2" W x 4/5" H, Weight 3 oz, Accuracy ±10% or 20 L/min, Reproducibility: Less than 5% or 10 L/min