The Aerobika® Oscillating Positive Expiratory Pressure (OPEP) device is a drug-free, easy to use, hand-held device with a proprietary pressure-oscillation dynamic that provides intermittent resistance and creates positive pressure and oscillations simultaneously. The Aerobika® OPEP device opens weak or collapsed airways to mobilize and assist mucociliary clearance to the upper airways where it can be coughed out.