I have a Sequal Eclipse portable oxygen concentrator for sale as my husband recently passed. It was fully serviced in 2014 and has only been used for a few hours since although using for a couple of hours every two months to keep charged. It can be used pulse up o 6 litres per minute and continuous 3 litres per minute. It is in excellent condition and essential for holidays. Just asking around £650 and need to collect from West London/Middlesex area. Please send PM if interested.