Brookstone flightforce User Manual page 15

CALIBRATING THE DRONE
1. After pairing, move the throttle backward and the steering
forward at the same time. Hold this until the drone's two LEDs
flash about three seconds.
2. When LEDs stop flashing, the calibration is complete. After
calibration, the drone should fly smoothly and hover in the air; if
not, trim your drone to fine-tune.
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