JY-RX03 / TX03 2.4G wireless receiver & transmitter box for wireless backup camera system, this is for replacement usage of Luview wireless backup camera system. 2.4G is a wireless transmission technology,because the frequency range is between 2.400GHz-2.4835GHz,so is called 2.4G wireless technology for short.（Image left for transmitter, right for receiver） If you are looking for manufacturing factories and developers of high-quality car cameras and monitors in China, Luview is the right choice for you!