The 2500 Fluid Flo Percussor mobilizes sections with harmonic chest vibrations and has been the work horse of hospital chest physical therapy for over twenty five years. This product successfully clears a patient's lungs of mucus and plugs. Fluid Flo mimics hand clapping commonly used for CPT Fluid Flo delivers deep, smooth pulses. Fluid Flo is comfortable and less fatiguing for patients and therapists. Fluid Flo is lightweight (1.5 lbs.) and mobile enough for anyone to use. Fluid Flo is reliable and factory tested for over 1000 hours. Fluid Flo requires 50 psi gas supply and is for hospital use only.