The Drive DeVilbiss Oxygen Conserver is a compact and portable solution designed to optimize oxygen delivery for individuals requiring supplemental oxygen. It features Auto-Adjusting Dosing, which intelligently monitors breathing patterns to ensure optimal oxygen delivery, adapting to the user's needs. With 7 Bolus Settings, it allows for precise dosage adjustments, catering to individual requirements. For extended convenience, the conserver boasts an Extended Battery Life, utilizing common AA batteries that can last for up to 2 years, further enhanced by an auto shut-off feature. Its Compact & Portable lightweight design makes it ideal for on-the-go use, ensuring convenience and mobility. The device operates with Quiet & Efficient gentle oxygen delivery in a compact package. Furthermore, it offers Versatile Compatibility, working seamlessly with most CGA 870 pressurized oxygen sources. Features Auto-Adjusting Dosing - Monitors breathing patterns for optimal oxygen delivery 7 Bolus Settings - Precise dosage adjustments for individual needs Extended Battery Life - Uses common AA batteries for up to 2 years of battery life; Auto shut-off Compact & Portable - Lightweight design for on-the-go convenience. Quiet & Efficient - Gentle oxygen delivery in a compact package. Versatile Compatibility - Works with most CGA 870 pressurized oxygen sources. Specifications Warranty 2 Year Limited Battery Life Up to 2 Years Dimensions 4.0"(W) x 6.5"(H) x 3.3"(D) Operating Pressure 500-3000 PSI PulseDose Volumes Liter Flow 1, 2, 3, 4, 5, 6, 7 Plus CF preset @ 2 LPM Savings Ratio Up to a 5:1 savings ratio from 14-40 bpm Weight 14.4 oz User Manual Click here to view the user manual.