I have this on used on my Hollyland Mars 400S. You just screw it on like the one that came with the Mars 400S. The signal strength doesn't seem to be better, but the speed is better. With the antenna that came with the Mars 400S I get about 1 second of latency, but with this antenna I get about 1/2. I think the investment is worth it. I managed to get through one floor and two rooms before the signal went off.
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