Features:Portable 3-wheel auto dolly with 5 levels of adjustable speed(11.8mm/s, 16.4mm/s, 19.5mm/s, 22mm/s, 25.8mm/s), ultra low noise and stable movement, suitable for time lapse/macro/low angle video shooting.The front wheel can be left and right rotated 90, so that you make the dolly move in straight line, circle route and opposite direction to achieve special shooting effect.Come with a 2.4G remote control, you can change the moving direction and speed easily by the remote control; and there are control buttons on the dolly also.The dolly body is made of high quality aluminum alloy material, max. 4kg/8.8lbs load capacity, can be used with smartphone, action camera, digital camera, DSLR camera, etc.With a 650mAh rechargeable battery that can offer up to 8h working under mobile phone load(0.8h under max. load); can be conveniently recharged by the included USB cable.