... ,rf receiver 3,CE certificate 4,working distance:>10m Features:Transmitter and receiver at 433.92MHz;U-shaped receiver that can ... be installed into the canopy easily;White transmitter that has 5 control keys: one for turning on/off ... .3 speed control keys: HI, MID, and LOW;Both the transmitter and receiver have 4 dip switches. They must have the ...