The Zadro tranquil sounds oxygen bar increases the concentration of oxygen in the air by up to 43%. Increased oxygen inhalation may help rejuvenate, replenish and renew the cells in your body. It can also help reduce stress levels and heal seasonal affective disorders. This personal oxygen bar has a headset that delivers oxygen directly near the mouth and nose. It also has speakers to play 4 nature sounds to soothe you. Connect it to your own personal audio device and listen to your favorite songs. This portable oxygen bar delivers up to 2.5 liters of oxygen per minute.