Green Valley LiBackpack C50 - Page 10

Tighten the screw.
STEP 4. Rotate the lock ring of the telescopic lever counterclockwise so that the telescoping poles can be extended or retracted smoothly.
Loosen the lock ring
STEP 5. Hold the bottom of the lock ring with your left hand, grip the bottom of the Scanner Arm with your right hand and extend it upwards.