Features: Upgraded motorized camera with scale indicator, 3 speeds adjustable (2,4cm or s 2,6cm or s 2,8cm or s) support move in the opposite direction Wheel angle adjustable in 180° allows you to achieve creative mileage in circle or straight movement. Ideal automatic cart for time-lapse or macro or low angle shooting. The body is made of high quality plastic, can withstand 3kg or 6.6lbs load, pocket and lightweight, easy to carry. Wireless remote control can change speed and direction and pause, effective distance 6m or 19,7ft the doll itself also has control keys. The 1 or 4" to 3 or 8" twist screw is suitable for most camera or 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 or 4" to 3 or 8" Convertible Screw Maximum load capacity: 3kg or 6.6lbs Speed: 2,4 cm or s 2,6 cm or s 2,8 cm or 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 or 19,7ft Remote control battery: CR2032 battery, 3 V (included)! Remote battery life: 18H Remote standby time: 2 years Product Size: 12,2 x 10,6 x 3,8 cm or 4,8 x 4,2 x 1,5in Product Weight: 296g or 10.4oz Package Weight: 495g or 17.5oz Camera and smartphone are not included. List of packages: 1 x Dolly with battery 1 x Remote control with battery 1 x USB Cable 1 x Connector 1 x Key 1 x Wheel Ring 1 x User Manual (English or Chinese)! 1 x anel de roda 1 x Manual to Usuário (Inglês or Chinês)