Feature: 1. 3 Speeds Adjustable: The motorized camera dolly with scale indication supports 3 levels of adjustable speed(2.4 cm/s, 2.6 cm/s, 2.8 cm/s), ultra low noise and stable movement. 2. Flexible to Use: 180° adjustable side wheels angle allows you to achieve circle route or straight line movement, very suitable for time lapse/macro/low angle video recording. 3. Large Capacity Battery: The auto video dolly has a built-in 1800mAh battery that can offer up to 6h working time and can be conveniently recharged by the included USB cable. 4. Wide Compatibility: Comes with a phone holder, a flexible ballhead and a mounting screw adapter, and supporting 3 kg/6.6 lbs load capacity, the auto video dolly can work with most smartphones, action cameras, digital cameras, DSLR cameras, etc. 5. Convenient Remote Control: Come with a wireless remote control, you can change the moving direction and speed easily by the remote control conveniently; and there are control buttons on the dolly also. Specification: Body Material: Plastic + MetalCamera Screw: 1/4 inch to 3/8 inch Convertible ScrewMaximum Load Capacity: 3kg / 6.6lbsSpeed: 2.4cm/s, 2.6cm/s, 2.8cm/sDolly Battery Life: 6hrsDolly Full Charge Time: 3hrsDolly Built-in Battery: 3.7V 1800mAh Rechargeable Li-ion BatteryRemote Control Effective Distance: 6m/ 19.7ftRemote Control Battery: CR2032 Battery, 3V(Included.)Remote Battery Life: 18HItem Size: 12.2 * 10.6 * 3.8cm / 4.8 * 4.2 * 1.5inItem Weight: 242g / 8.5oz Package List: 1 * Dolly1 * Remote Control1 * Wrench1 * Wheel Rings1 * USB Cable1 * Mounting Screw Adapter1 * Phone Holder1 * Ballhead1 * User Manual