The AV-300AHD-MINI kit is designed for transmission of high resolution image in AHD-M / AHD-L / PAL standard. A both devices have built-in the antennas, which enable good quality transmission up to 300m distance and can operate on the one of the 8 available frequency channels.
To correct operation, the transmitter and the receiver should be visible to each other and have set the same channel configuration (the same channel switchers settings).