Specification: -100% brand new and high quality -Model No.: DDT-2A -Display control: hd LED touch screen -Rated voltage: AC220V + -22V -Control distance: about 18 meters infrared remote control -Net weight: 8kg -Operation Noise: ≤45db -Oxygen absorption method: molecular sieve variable pressure absorption (PSA) -Product size: 404×182×383mm -Inhalation Method: Convenient both in Ear-hook Breathing Apparatus or Nose Breathing -Oxygen Concentration: 30%(±3)-90%(±3), Adjustable -Oxygen Flow: 2L-9L/Min, Adjustable -Power Input: 230W -Anion Output: High Frequency Anion Transmitter, 6Million/cm³ Normal Working Conditions: 1. Environment temperature: 32 - 104°F 2. Relative humidity range:<80 3. Atmospheric pressure range: 96 - 106kpa Package Included: 1 X DDT-2A Oxygen Concentrator Generator 1 X 3 Meter Oxygen Tube (Including Water Storing Equipment) 1 X Ear-hook Oxygen Inhaler 1 X Nasal Suction Oxygen Tube 1 X Remote Controller 1 X Power Cable 1 X Nasal Suction Oxygen Outlet 1 X Air Filter & Plastic Cap 1 X Oxygen Outlet & Fuse 1 X User Manual & Certificate 1 X Warranty Card