Comfort Cough - This COMFORT COUGH (SICC2001) is composed of body part, connection tube, and power cable, providing positive pressure gradually and then turning it into negative pressure fast, to make high expiratory pressure to suck up body fluids (secretion in the respiratory tract) just like when people inhale.This product contains a regulator which can control the pressure and the flow so that the user can setup expiratory pressure, suction pressure, and flow. Also, this product contains Bacterial filter to prevent the inflow of body fluids into the body part of the product.