Almost new, refer to link for details:

https://m.yuwell.com/index.php/product/info/57.html

鱼跃制氧机8F-5W 医用级5L家用吸氧机

静音升级 0-5L无极调节 医用氧浓度

Yuyue 8F-5W Oxygen Concentrator Medical Grade 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)