NEEWER 3 Wheels Wireless Video Camera Dolly, Speed Motorized Electric Track Rail Slider Dolly Car with Remote Control, Compatible DSLR Camera, Camcorder, Gopro, and Smartphone

REMOTE CONTROL:The wireless remote control can change speed & direction & make a pause, effective distance 6m/19.7ft; 3 speeds adjustable (1.4cm/s 2.4cm/s 3.0cm/s) ADJUSTABLE WHEEL: Wheel angle 180°adjustable, you can achieve creative circle route/straight line movement as well can achieve pitch shooting through bowl head. Adjustment of the middle screw can change opposite position of two wheel frames.If you wanna loosen or tighten wheel screw, the six-angle wrench may do a favor CONVERTIBLE SCREW: 1/4" to 3/8" convertible screw is suitable for most camera/smartphone holder BUILT-IN BATTERY: Built-in 1800mAh rechargeable li-ion battery can offer up to 6hrs service time; USB charging port and charging cable are available LIGHT INDICATORS: 4 light indicators showing charging status(red-charging;green-fully charged), battery power(low power when 3 indicators flashing) and speed(indicators always on means speed position)