The transmitter and the receiver are used in the same channel in pair and can be used in the modes of point-to-multipoint or multipoint. Images received by means of radio are vivid and stable, the color is flamboyant, and the sound is clear. Supports video transmission of PAL/NTSC system and stereo audio transmission. Fully hardware-designed. There is no need to install software. Plug and play. Simple and convenient. Dimensions: 10cm(L)x8.5cm(W)x3.0cm(H). Module is FCC CLASSB certificated. Wireless application is safe and reliable.