Features: Upgraded motorized camera dolly with scale indication, 3 levels of adjustable speed (2.4cm/s 2.6cm/s 2.8cm/s); support move to the opposite direction; 180adjustable wheel angle, you can achieve creative circle route/straight line movement. An perfect auto dolly for time lapse/macro/low angle video shooting. The body is made of high quality plastic material, can support up 3kg/6.6lbs load, pocket size and lightweight, easy to carry. The wireless remote control can change speed & direction & make a pause, effective distance 6m/19.7ft; the dolly itself has control keys too. 1/4 inch to 3/8 inch convertible screw is suitable for most camera/smartphone holder; you can also use the included ballhead with this dolly to achieve more flexible and more stable usage. Built-in 1800mAh rechargeable Li-ion battery can offer up to 6hrs service time; With USB charging port and charging cable, 4 light indicators showing charging status(red-green), battery power(flashing) and speed(normal on). Specifications: Brand: Andoer Model: L4 PRO Color: Black Body Material: Plastic Camera Screw: 1/4 inch to 3/8 inch Convertible Screw Maximum Load Capacity: 3kg / 6.6lbs Speed: 2.4cm/s 2.6cm/s 2.8cm/s(Camera Weight Must Be 1kg) Dolly Battery Life: 6hrs Dolly Full Charge Time: 3hrs Dolly Built-in Battery: 3.7V 1800mAh Rechargeable Li-ion Battery (Included) Remote Control Effective Distance: 6m / 19.7ft Remote Control Battery: CR2032 Battery, 3V(Included) Remote Battery Life: 18H Remote Standby Time: 2 Years Item Size: 12.2 * 10.6 * 3.8cm / 4.8 * 4.2 * 1.5in Item Weight: 296g / 10.4oz Package Size: 18.5 * 14 * 6cm/ 7.3 * 5.5 * 2.4in Package Weight: 660g/ 1.5lbs Note: Camera and smartphone are not included. Package List: 1 * Dolly with Battery 1 * Remote Control with Battery 1 * USB Cable 1 * Connector 1 * Wrench 1 * Wheel Ring 1 * Ballhead 1 * User Manual(English/Chinese)