1.It is suitable for cruise crossing scenarios, such as low altitude crossing and distance pulling. In actual use, adjust the tilt angle of the flat antenna appropriately, so that the antenna is perpendicular to the ground when flying low, and the transmitting antenna is right-rotating circularly polarized for better effect. 2.the layout of the aircraft, the aircraft in the installation of the map should be far away from other electronic equipment, especially when the electrical ESC and battery these three electronic equipment on the map of the interference is very large. In addition, it should also be far away from the gps and flight control, the map affect the gps star search. 3.the choice of flight environment, try to choose around the radio equipment less, the terrain is high unobstructed place to fly. 4.the installation of the antenna placement, the map transmission antenna should be placed vertically. 5. the use of flat plate antenna to determine the orientation of the aircraft, flat plate antenna directional antenna, the use of the need to align the aircraft as far as possible, once deviated beyond the coverage of the flat plate antenna map soon lose the transmission signal, the effect is not as good as the use of omni-directional antenna. These factors are the fundamental of whether the map transmission can be transmitted over long distances. CURR/CRT: current monitoring VCC/+: positive battery voltage input GND/G: negative battery voltage input VID / S /: image transfer signal line transmission LED:Lamp with signal line SBUS/PPM/DSM:Receiver signal interface for different transmission protocols SDA/SCL connects # into the signal line of compass and GPS TX/RX:UART serial port, TX stands for transmitting out data, RX stands for receiving data Antenna color is random, no specified color is accepted Specification:B:Inner Needle Color: As shown Material: plastic+metal Package Contents: 1 x Gain Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.