Two Premium models to choose from, Autoset & Autoset for her Models -3-year warranty. This device offers Auto Ramp to fall asleep with ease. A quiet Easy-Breathe™ motor. Expiratory pressure relief (EPR™) maintains optimal treatment during inhalation and reduces pressure during exhalation. SmartStart™ allows you to start therapy by breathing in. Integrated humidification for simple easy use. With AirView™, you can access therapy, troubleshoot and change device settings remotely. User-friendly controls, color LCD screen for simple navigation of menus to customize comfort settings. Built-in ambient light sensor adjusts brightness based and turns off automatically.