The Pocket-Spiro® MPM100 is a simple and non invasive device for the measurement of Maximum Inspiratory and Expiratory mouth pressure (MIP / MEP), the maximal peak pressure both inspiratory (SNIP) and expiratory. The device is of high precision, portable, reliable, robust, handy, compact and easy to use. It is operated by a single button (ON/OFF/measure) and battery operated when not connected to a computer USB port.