GoPro Smart Remote User Manual page 13

/ Pairing the Remote and Your GoPro
You can pair the Smart Remote with any wireless-enabled GoPro camera.
The remote can control your camera from up to 600' (180m) away in optimal
conditions. You can control up to 50 GoPros at a time with the remote. Your
camera recognizes only one remote at a time.
The distance from which you can control your camera with the remote
varies and depends on factors such as terrain, weather, obstructions and
electromagnetic interference.
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