The wavelength of fiber on side is 1310nm The interface is defined as: RX/TX/AV/VCC/GND RX is connected to CRSFTX of flight control, and TX is connected to CRSFRX of flight control The AV on side is connected to AV signal output port of flight control, and VCC power supply voltage is 5.5V~26V Power supply: 5.5V-26V: (2S-6S battery) Power consumption: less than or equal to 5W Communication interface: MX-SH1.0mm-5P: CRSF interface/CVBS video port Fiber optic interface: FC Communication distance: maximum 20KM Note: The product indicator lights from top to bottom are: power light, fiber optic light, video light, data light; GND is ground wire, VCC is power supply, AV is video, TX is TTL signal output, and RX is TTL signal input Due to different batches, there may be differences in product appearance, color, and printed text, which do not affect use Color: Green Material: PC+Plastic Package Contents: 1 * TX Module 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 to be slightly different from the actual thing The measurement allowed error is +/- 1-3cm