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 to 3/8 convertible screw is suitable for most camera/smartphone holder. 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/Grey(Optional) Body Material: Plastic Camera Screw: 1/4 to 3/8 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: 13.7 * 13.7 * 7cm / 5.4 * 5.4 * 2.8in Package Weight: 495g / 17.5oz 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 * User Manual(English/Chinese)