Description of the Air Sep – Free Style Comfort oxygen generator allows for the supply of oxygen at a concentration of over 95% with a capacity of 1-5 liters per minute. Like other oxygen generators, the device infuses oxygen in pulses. The portable oxygen generator operates on a lithium battery for up to three hours depending on the oxygen flow rate used. Battery charging time – 3 hours. Battery life – about 300 charges. The oxygen generator operates at a noise level of 43 decibels. The “Free Style” oxygen generator weighs only 2.3 kg and is convenient and easy to use, especially when leaving the house. Made in the USA. Generator dimensions: 25.4*18.5*7.9 cm. Includes: car charger, 220 volt charger, carrying case. The price includes training at the customer’s home.