Oxygen concentrator unit comes on powers up had it working for over an hour seems to be fine no alarms no warning lights everything seems to be working I’m selling it as spares and repair because I don’t know if it producing oxygen however I would think if it wasn’t it would come up with a fault code or an alarm comes with remote you will need pipe and mask no returns it is spares or repair so sold as seen bargain price as these do cost a lot of money will be sent recorded delivery
eBay