It depends on which model you have but in general it is 50-75 meters on the smaller drones and 100-150 meters on the larger drones.
MY DRONE WON'T SYNC WITH THE GLOVE?
Turn your drone on - lights should flash quickly
Turn your glove on - drone lights will now flash slowly, glove will flash rapidly
Move the throttle from the lowest position to the highest and hold for 2 seconds - drone lights will now go solid
Move the throttle from the highest position to the lowest - glove light will now go solid.
If the lights do not react as state above, keep moving the throttle from low to high slowly back and forth - it will eventually sync. There are over 200 combinations so please continue to move the throttle - once synced the drone/glove pair will only require one throttle toggle.