Smart audio support. This FPV VTX supports SmartAudio, so you can change VTX settings in Betaflight OSD, such as channels and output. | One button frequency and power setup. If you don’t like smart audio, you can change of channel, band, and power by only one button on this FPV VTX. | Built-in Mic. It is a good thing about FPV VTX with a built-in microphone. It allows you to hear your quad though it flies too far. | Wide voltage input. 7-28V input. 2-6s battery is available. 5V output. This FPV VTX provides 5V output to your FPV camera. | 200mW/400mW/800mW/1000mW power switchable.