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 is convenient and fast It can be driven on the slide track Compatible with: DSLR camera, camcorder, mobile phone Rail Slider:? CNC machining, surface anodizing The product has added a buckle on the track foundation, which can be installed on the car, effectively preventing the car from falling off the slide rail during operation, causing damage to the photography equipment The slide rail pipeline is composed of three parts that are spliced together and can be disassembled. The length of the slide rail can be freely selected, and the effective stroke is 62cm It is equipped with adapter screws, which can be adapted to photography carts and can be connected to other photography equipment externally The four feet of the slide rail are equipped with adjusting nuts, which can be adjusted to achieve a balanced state of the slide rail Both the footrest plates at both ends of the slide rail and the bottom connecting plate are equipped with 1/4 and 3/8 threaded holes, which can be connected to other equipment externally Specification: Material: aluminum alloy+ABS Load bearing: 3KG Voltage: 3.7V Battery capacity: 1800mAh Work time: 6H Body battery charging time: ≤ 3h Distance of wireless remote control: 6m Remote control standby time: 6 months Normal use of remote control: 60000 times Remote control continuous operation: 18h Remote control battery model: CR2032 The test speed for load capacity of 3KG, fully charged, on a horizontal plane, and in a straight line is as follows: 1st gear speed: 1.4cm/s; 2nd speed: 2.4cm/s; Third speed: 3.0cm/s