1-5L/min 30%-90% purity portable oxygen concentrator generator

Description

1.Adjustable Oxygen Flow 1L/min--5L/min Oxygen purity 30percent--90percent 2. standard shipping by FedEx DHL UPS, fast delivery to you. 3.Intelligent control is convenient to use 4.Portable to carry, smart light body only 6KG 5.110V-240V voltage, Can be used all over the world 6.Noice is less than 35db