The New Medistrom Pilot-24 Lite is a revolutionary small Backup Power Supply/ Portable Travel Battery for ResMed, and other 24V PAP Devices. It is compatible with most CPAP, APAP and some BiPAP 24V devices. Provides 1-2 nights of continuous run-time on an average CPAP pressure, average breathing rate, optimal mask seal and with the humidifier, heated tubing and exhalation pressure relief disabled. To use the Pilot-24 Lite with the *ResMed S9, *Philips Respironics DreamStation Go Travel PAP, *3B Medical Luna or *Apex Medical iCH machines you will need to purchase the Medistrom ResMed S9 Kit for Pilot-24 Lite, the Medistrom DreamStation Go and 3B Medical Luna Kit for Pilot-24 Lite, or the Medistrom Apex Medical iCH Kit for Pilot-24 Lite respectively (*cable kits sold separately). Cannot be used in the backup configuration with the ResMed AirMini AC Power Adapter.