Features and Benefits: Newly enhanced usage and performance log provides results in five easy-to-read graphical data screens and downloads directly to a PC for evaluation when using DeVilbiss CPAP LT Software (8054D-620). Features a self-contained pneumotach to monitor patient's breathing patterns. International power supply operates from 100 to 240 Volts AC and at 50 or 60 Hz, 120 Volts, 400HZ Parameters can be set using either on board or PC software. The RPM AutoAdjust system ultimately improves patient tolerance by minimizing mean airway pressure.