A-PASS-20 is a Auto CPAP device designed for the treatment of adult Obstructive Sleep Apnea (OSA)/Hhypopnea/Snoring. Pressure Range is between 4-20cmH2O, auto adjustment. Technical Specifications ModelA-PASS-20 Auto CPAP Machine Dimensions(cm)28L x 14W x 9.5H Carton Dimensions(cm)38L x 36W x 16H Gross Weight3.9KGS Power SupplyInput 100-240V, 50-60Hz, 2-1A Output +24V, 2.5A Working ModeCPAP, Auto Screen2.8 inch TFT, 320 x 240 Screen Auto SleepAuto sleep in 15 minutes, press any button to highlight screen Over-Temperature ProtectionMotor will stop work automatically and buzzle will ring 4 times when temperature is over Button Press and Power off SoundYes Data StorageSD Card DC Voltage24VDC DC Current2.0A maximum Sound