This is a Fatshark Filtered Balance Lead Power Supply which is great if you want to have a nice clean power source for your FPV setup. In some cases your ESC/servos can cause interference with the video signal to cause poor quality video. Using a filtered balance lead helps to overcome this by filtering the power provided to the camera/ FPV transmitter for the best picture quality. This allows you to use a single battery for your FPV setup.
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