exhaust fan /bathroom fan/fan: 1.all kinds of shape can be choice(round , square and so on) 2.a lot of dimension(200*200,350*350 and so on) 3.Two voltage--220V and 110V to supply. 4.Many power --from 25W to 65W 5.a lot of colour for custom-tailor 6.CE certificate 7.Easy installation 8.power saving