Oxygen Concentration - 90%+/-3%

Oxygen Flow Max - 1.2 liter/min

Warranty - 3years for main unit , 1 year for Sieve Bed and Battery

Warm-Up Time - 2 minutes

Weight - 4.37 lbs. 1.98kg (includes battery)

Oxygen Flow - Pulse dose delivery system Five flow settings 1,2,3,4,5,6

Battery - Recharge approximately 4 hours with AC or DC power

Noise Level - 49 Decibels*@setting 2 

Display Screen -2.8 inch

Operation - Simple control functions and easy-to-read LCD display

Use - Designed for 24/7 use