This silver Philips air purifier was brought 18 months ago and had a new filter 5/6 months ago. Great condition. We liked this one over the Blue Air as it has a circular light which changes from red, pink and purple depending on air cleanliness and shows blue if air is clean. If air stays 'blue' for a while, the machine automatically goes on standby. Different fan strength options or automatic. Asking only 1000RMB for quick sale.