More documentation Smart mouthpiece ventilation (MPV) Astral information bar Big button feature Keep exploring Visit the library Click here to access the user guides for your respiratory care mask and machine. Download the user guides Masks ResMed offers a wide range of masks that combine lightweight comfort with superior seal and fit. See all ResMed masks Accessories Our selection of replaceable spare parts and device accessories helps ensure your equipment continues to work optimally. Explore Related products Astral external battery An external lithium-ion battery intended for hospital and home use with Astral ventilator Read more Astral mobility bags Designed to allow mobile use of the Astral ventilator Read more Circuit support arm Holds ventilation circuits and mouthpieces securely in a convenient position for patients using an Astral ventilator Read more