YKS TS450 32Ch 5.8G 450mW Mini FPV Wireless Audio/Video Transmitter for 450 550 Quadcopter Good capacity of anti-interference to ensure clear reception quality of video and audio. This item is a very small 5.8Ghz transmitter. It is perfect for FPV model applications, very small and light . Two switching buttons: CH button for frequencies channels switching, FR button for frequencies bands switching. FM modulation for superior performance. Wireless transmission distance up to 1000m. ( Actual transmission distance depends on specific environment ) .