MOB MO9379 Manual Del Usuario página 7

A key return
When the quadcopter fly far away, one key return button can recall
the quadcopter. After binding the quadcopter, the antenna of the
transmitter must be aligned the tail of the quadcopter when it take
off. Press the one key return button to go into return mode with the
light flash. Press the button again to exit return mode. During the
returning, the forward and backward movement of right lever can
interrupt this function.
High and low speed switching
During the flight of the quadcopter, the flight speed can be
switched by pressing this button while it forward, backward, turn
left and turn right. The quadcopter speed defaults to a low speed.
Press this button once to switch to medium speed. At the same
time, the transmitter buzzer beeps twice. Press the button again to
switch to high
speed. At the same time, the transmitter buzzer beeps three times.
One more pressing turn back to low speed and beep once.
3D Eversion