Fangrui Product Details Cautions: When The New Device Cant Be Remote Controlled, Please Check To See Whether The Bar Codes In Emitter And Receiver Are Consistent, Whether The Indicator Light On The Emitter Is Working, Whether The Cable Of Receiver Is Connected Properly And Whether The Buzzer Beeps Once When Power Is On. When The Receiver Cant Be Controller By Emitter, Please Checking To See Whether The Battery Contact Normally And Whether The Power Is Enough, Please Battery In Time When It Is Out Of Power. Insensitive Remote Controlling Probably Because Of Interfering Environment And The Low Battery. Please Remove Battery When It Isnt In Used For A Long Time. Please Wiring Properly In Strict Accordance With Parameters On Labels. Otherwise It Will Directly Shorten Life Of This Device Or Cause Malfunction Immediately. The Antenna Mustnt Connect With Other Wires. When These Is A Code Switch On Fan, Please Turn The Fan To The Highest Gear Before Remote Controlling. The Receiver Beeps When You Click The Remote. It Might Both