Weighs less than 5 lbs. with battery installed, Easy-to-read and -access LCD screen, readily accessible battery pack, fits in a convenient carry bag with pockets for, extra batteries, choice of delivery modes – SmartDose Technology or standard PulseDose® mode, more sensitive conserver trigger with the ability to detect your breathing at a lower pressure than other concentrators– you receive the oxygen you need without delay, protective, rugged overmold provides an extra layer of protection against drops and damage and Federal Aviation Administration (FAA)- compliant for air travel. Comes with battery, carrying case, power cord and power supply. We also offer a different model that comes with an extra battery.