Eastsun Development Limited is a global specialist in oxygen generators. It supplies oxygen concentrators to many customers. Oxygen concentrators cover many types and accept OEM and customization. Welcome to send us your inquiry. -Full range of acceptable payment methods such as Paypal, Western Union, Bank Transfer, Alibaba Trade Insurance, AliPay, etc. At present, many of our products have passed CE ROHS ISO SGS FDA and some other test certificates, reaching the industry leading professional level. With years of experience in the oxygen machine industry, we are confident to provide our customers with the right stuff. With our commitment to high quality, prompt response and timely delivery, we enjoy great customer satisfaction and maintain a good and stable relationship with our customers. Guarantee: -100% CE ROHS ISO certified products with 1 year warranty -Professional online service (7*24 hours) with technical support. -65% of regions and countries are supported to be shipped directly from our overseas warehouse (save your time and shipping cost).