Breathe O Meter Device is simple secret for successful asthma control. It is a peak flow meter is a portable inexpensive, hand-held calibrated instrument device used to measure lung capacity in monitoring breathing disorders such as asthma.Use: Used to measure lung capacity in monitoring breathing disorders such as asthma.Salient features of Breathe O Meter Device:- Simple and easy to use- Hand-held calibrated instrument device- The device has been calibrated using the EU scale, in accordance with the internationally accepted European Union StandardsHow to use:- Please read the enclosed leaflet carefullySafety information:- Read the user's instruction manula carefully before use - If the device isused repeatedly as a screening device patients should be instructed to inhale beofre placing the meter in their mouth- Disposable mouth piece shoudld always be used for this application- Frequently washing of the device is required- Do not open the device as the inside parts may get damaged - Keep out of the reach and sight of children