Featuring programmable presets, the AHP300 allows trained caregivers to rapidly recall up to 5 saved ventilation protocols. Up to 7.5 hours on internal battery, with auxiliary battery capability for up to 21 hours of battery life. Allows the use of low pressure sources (oxygen concentrator, liquid oxygen, etc.) to extend available oxygen. For everyday transport or evacuation from extreme environments, the AHP300 has you covered. It features rugged shock and vibration resistance, and IPX22 water resistance. Simple preventive maintenance schedule along with low-cost battery and repair parts result in significant savings and lower cost of ownership than comparative broad-featured ventilators.