One of the key factors in determining the accuracy of a spirometer is its accuracy in evaluating lung function. This portable and lightweight device is known for its high performance measurement and the chances of comparing it with the previous reading and the readings to be done in the future. Automatic selection of the best reading is also possible. The use of disposable mouthpiece adds to the hygiene factor of the device. The electro filing system facilitates enhanced data management capability of the device because the in-built memory feature in the device can store up to 120 readings at a single time.