... inquiry,we will send the quotation and detail to you soon,or talking about on Trademanager,thanks! About ... amplify it - from 15 to 18 times, depending on the models. With no blades or grille, they’re safe ... more steady and it can be to decrease the noise at the most;(4) It has voltage protection and ... , when user control by remote-control or directly on the control-panel, it will make a warning tone ...