Features of the Puritan Bennett Sandman Intro CPAP System: The Sandman Intro CPAP device with fully integrated heated humidification provides quiet, effective CPAP therapy for a wide range of prescriptions. Features industry-leading LoSat expanded accuracy range (60% to 100% SpO2) when used with OxiMax adhesive sensors, for better management of patients with congenital heart disease. Integrated heated humidifier for breathing comfort. Wide pressure range (3 to 20 cm H20). Ultra-quiet operation. Fluid-resistant, front-facing display screen.