Auto-Adjusting Ramp: The AirSense 10 has an auto-adjusting ramp that starts at a low pressure and will slowly build up to your prescribed pressure. Built-In-Humidifier: The built-in-humidifier helps keep your airways from being dry and irritated. Quiet Operation: The Air sense 10 has a low noise volume of only 26.6 DBa making it quiet enough for you to get a good nights rest with out being interrupted. Easy-to-Clean: This unit has a built-in humidifier, which helps create a more comfortable user experience. The removable water humidifier tub is easy to fill and easy to clean. Reconditioning is a thorough and rigorous process that ensures the product meets all quality expectations, cosmetically and operationally. WHAT'S INCLUDED: CPAP machine and power supply only.