Resmed Aircurve 10 ST BiLevel with Heated Humidifier - Standard Plus Bipap Machine PackageResmed Aircurve 10 ST BiLevel with Heated Humidifier Standard Plus Bipap Machine Package Model Number: 37306 Condition: We have both Brand New and Lighly Used machines. And we have very used machines with over 1000 hours. Choose which condition you want on the drop down menu. The lightly used machines have less than 1,000 hours of use on it. Which means it was used for about 4 months. These machines can last up to 10 years(30,000 hours) All items have