The LifeChoice Activox 4L portable oxygen concentrator (POC) features a long-lasting battery and advanced technologies in a user-friendly, lightweight design. It is equipped with responsive algorithms, variable settings and useful features to meet your patients' therapeutic requirements. Carry bags, adjustable straps and charging options provide freedom and flexibility to meet their lifestyle needs. Patients won’t feel weighed down by therapy. Instead, they can forget about their disease and focus on enjoying an active life.