The device ;Philips Respironics DreamStation works by providing automatic continuous positive airway pressure to treat sleep apnea and prevent snoring and suffocation during sleep. It provides respiratory comfort by automatically adapting to the user's breathing patterns. Device consumables: Masks and air filters are sufficient for two to three years. Device card SD Card. Heated electric tube. Three water tanks. Electric cable. Travel bag. Equipped with a steam humidifier that prevents dryness of the respiratory membranes. It comes with a power supply that works on 110 to 240 volts for ease of use during travel with a special travel bag for the device. Includes smart wireless connectivity to evaluate and monitor treatment progress via the DreamMapper application. Device consumables such as masks and filters are available. Device source: United States of America. Recommended for sleep apnea patients under medical supervision. There are no defects in the device. Reason for selling: Availability of a newer generation device before receiving this device. The device is refurbished and has not been used at all. Please ensure the device is recommended on the prescription issued to the patient. Acclimation made easy DreamStation includes a set of tools to help make it easy for patients starting PAP therapy and for their continued long-term use. EZ-Start can help patients gradually acclimate to therapy, while SmartRamp allows users to fall asleep to lower pressures. Wake up to progress Each morning patients are greeted with a summary of their progress to motivate them to stick with their therapy. The display shows a simple trend of their nightly hours of use, followed by a summary of the last 30 days of “good nights” that have more than 4 hours of use. The Mask, nasal pillows, & Filters are provided. refurbished Not used.