This filter improves video reception for 1.2-1.3GHz video receivers in combination with TBS Crossfire. Due to the poor filtering on the video antenna input and wide operation frequency of most common 1.2-1.3GHz video receivers, they are unable to properly separate the video feed from the TBS CROSSFIRE transmission signal. 

Mount this filter between your video receiver and antenna and you're good to go.

This filter helps to block the 868MHz signals, if you happen to use 915MHz click here.