Almost new, refer to link for details:

https://m.yuwell.com/index.php/product/info/21.html

Yuyue 8F-5AW Oxygen Concentrator Medical Grade 5L 90% Concentration Oxygen Inhaler Household Oxygen Inhaler Elderly Pregnant Women Oxygen Machine.

Self-collect at lakeside mrt

or delivery for S$20.00, within 1 working day(s)