Camera Dolly: Standard 1/4 and 3/8 screw holes with 1/4 and 3/8 screws can be used with various types of ball head Can be shot in a straight line, equivalent to an electric slide Curved shooting, 360 degree uniform rotation shooting Can pitch shoot from an elevated angle Wireless remote control, remote control distance of 6 meters USB charging, convenient and fast It can be driven on the slide track Compatible with: DSLR camera, camcorder,mobile phone Rail Track: The track length is 61.3cm and can be used on uneven ground or tables, relative to the slide track The conduit splicing design of the track, each 20cm long, has a small packaging volume and is easy to carry Added a buckle to prevent the car from falling, greatly improving safety, making disassembly and assembly easy, with threaded holes in all directions for easy external connection to other equipment Specification: Material: Aluminum alloy ABS Load bearing: 3KG Range: 4h Body battery charging time: approximately 3 hours Internal battery capacity: 1800mAh Maximum speed: 10cm/s Adjustable speed, 0-100% optional APP remote control distance: 8m (maximum without interference) Track size: 616 * 133mm