ITEM NAME:10X JDY-40 2.4G Wireless Serial Port Transmission Board Transceiver Module J5S9 10X JDY-40 2.4G Wireless Serial Port Transmission Board Transceiver Module J5S9 JDY-40 is developed by 2.4G technology,with a distance of 120 meters.It uses serial communication interface,which is simple and quick to use.Yo u can apply JDY-40 to products only needs to know the knowledge of serial port. Color:picture color Material:PC + metal Package Contents: 10 * Wireless Transmission Board.10 Wireless Transmission Board.