For more than 15 years, DeVilbiss PulseDose oxygen conserving technology has been on the leading edge of ambulatory oxygen therapy. The PD1000 PulseDose Compact Oxygen Conserving Device delivers clinical benefits and operational savings unmatched by other conserving technology. The PD1000 PulseDose offers an industry leading 3-year warranty and was designed to endure the demands of everyday use. The unit casing is extremely durable, constructed with Lexan impact resistant plastic. Additionally, the cannula fitting is protected to minimize potential damage.