YELANGU L4X-BC Video Camera Dolly 3-Speed Motorized Electric Track Rail Slider Dolly Car for DSLR Camera/Camcorder •Standard 1/4 and 3/8 screw holes with 1/4 and 3/8 screws can be used with various types of ballhead •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 •Compact structure,foldable and portable Compatible with: DSLR camera,camcorder,mobile phone •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 Package included: •1 x Camera Dolly •1 x Remote Control •1 x Pan Tilt •1 x Charging Cable •1 x English User Manual