EVOX Battery Operated Oxygen Concentrator For Hospital is made to provide best purity upto 95-96%. It has special feature like OPI Oxygen Purity Indicator, the benefit of this OPI is it shows Live oxygen purity in the LED display screen giving confidence about the purity it is provided by the machine. It has long sieve life upto 18000 hours or a minimum of 3 years. The machine is 15.6kg in weight. Easy portable and good design make it best choice for buy.