●Smartphone App Control: Dolly can be controlled wirelessly by pairing with iOS and Android smartphones. Support 3 modes: Manual, Video, Time Lapse, Customize and Save Settings and Apply ●(Free Movement & 5 Speeds) Dolly moves smoothly and straight, and can be moved from side to side on flat surfaces. Use the app to control dolly at 5 speeds By manually tilting the wheels, the dolly can be moved in a curved or circular manner. Various camera movements enhance video quality ●Customize shooting mode: Manual mode allows you to set the direction of movement, speed (1 - 5 levels), travel mode (evenly / slow), and video mode (26.0 - 39.0 inches (66 - 999 cm), and moving mode (evenly / slow). In time lapse mode, you can set up shutter speed, frame length, shot count, and fixed point shooting (Note: A camera shutter cable is required for time-lapse photography, not included) ●Smooth & Quiet Step Motor: In addition to the precision bearings on the wheels that provide smooth movement, the high-precision motor reduces operating noise within 30 dB for a quiet video shooting environment ●【Foldable Design & Wide Range of Use】The dolly is foldable and easy to store. Equipped with 1/4" mounting screws and 360° ball head, the Dolly can be used to mount smartphones (including phone holder), mirrorless cameras, DSLR cameras up to 6.6 lbs (3 kg) action cameras and is suitable for live streaming, interviews, advertising, hood videos, filmmaking, etc. USB Type C is for charging and firmware upgrades