Features: Upgraded motorized camera with scale indicator, 3 speeds adjustable (2,4cm/s 2,6cm/s 2,8cm/s); support move in the opposite direction; Wheel angle adjustable in 180° allows you to achieve creative mileage in circle/straight movement. Ideal automatic cart for time-lapse / macro / low angle shooting. The body is made of high quality plastic, can withstand 3kg/6.6lbs load, pocket and lightweight, easy to carry. Wireless remote control can change speed and direction and pause, effective distance 6m/19,7ft; the doll itself also has control keys. The 1/4" to 3/8" twist screw is suitable for most camera/smartphone mounts. Built-in 1800mAh lithium-ion battery can provide up to 6 hours of operation; With USB charging port and charging cable, 4 light indicators showing charging status (red-green), battery power (flashing) and speed (normally on). Technical data: Brand: Andoer Model: L4 PRO Black color Body Material: Plastic Camera Screw: 1/4" to 3/8" Convertible Screw Maximum load capacity: 3kg / 6.6lbs Speed: 2,4 cm / s 2,6 cm / s 2,8 cm / s (camera weight must be 1 kg)! Dolly Battery Life: 6 hours Dolly Full Charge Time: 3 hours Dolly Built-in Battery: 3.7V 1800mAh Lithium-Ion Battery (Included) Effective remote control distance: 6m/19,7ft Remote control battery: CR2032 battery, 3 V (included)! Remote battery life: 18H Remote standby time: 2 years Product Size: 12,2 * 10,6 * 3,8 cm / 4,8 * 4,2 * 1,5in Product Weight: 296g / 10.4oz Package Weight: 495g / 17.5oz Camera and smartphone are not included. List of packages: 1 * Dolly with battery 1 * Remote control with battery 1 * USB Cable 1 * Connector 1 * Key 1 * Wheel Ring 1 * User Manual (English/Chinese)! 1 * anel de roda 1 * Manual to Usuário (Inglês / Chinês)