Olex oxygen concentrator vm oxy 5 is sofisticated designed for domestic use continous 20-24 hrs working capacity with 24 month warranty for the whole machine.adpots USA PSA technology. Specifications In The Box Sales Package 1 Main Unit, 1 Bottle, 1 User Manual, 1 Canula, 1 Power Cable General Brand Olex Model Number VM OXY 5 Flow Type Continuous Mode Flow Rate 1.5 Litre Per Minute Portable Yes Power Consumption 320 Sound Level < 44dB (A) Battery Life 24 Dimensions Width 32 cm Length 62 cm Weight 15.9 kg Warranty Warranty Summary 2 Years