If you use iphone 11 wide angle lens or external wide angle lens applied to smartphones to shoot, you may include the gimbal arm into image and you need move your phone away from gimbal then you need the counterweight to keep balance.

Ulanzi ST-10 adjustable angle design allows you to fix on the tripod or camera hot shoe mount and adjust the pitch angle without the ball head. 360° adjustable, support horizontal and vertical shooting. Quick release resign, easy to use.