Note: there will be noisy during the operation of motorized dolly car when you are recording audio. At only 21.6”/55cm in length, the mini video slider allows you to take it with you anywhere, anytime. There are 1/4" and 3/8" threaded holes on both sides of the slider rail and on the base plate for connecting to other photography equipment. The dolly's wheel angle is 180 degree adjustable. Achieve creative circular or linear movements. By adjusting the angles of the wheels, you can customize the dolly's route. Use the USB charging cable to recharge the camera dolly with a portable charger or a USB wall charger for more convenience.