1.High quality PC material 2Size-6' 8' 3.Keep indoor air fresh 4.low-noise,large wind Features:1,High quality PC material2,Low noise and large wind capacity3,With "Automatic Self-Checking Funtion",through the compute managmant system,you can master their working state easily4,Stregthen motor,increase wind preasure,desrease energy loss. modelspecificationflow ratespeedvoltagepowernoisepacking mmm3 ...