psychological luck to take the emergency rescue channel, traffic police can not arrive at the scene 

in time to ease traffic.
Drones are being put to great use.
As a new carrier of high-tech, UAV has been 

widely used in many fields.
Mount the optical zoom camera and control the megaphone, the ground 

station controller to control the plane to the traffic congestion of the road section, record illegal 

driving emergency rescue vehicles,
Through the air megaphone to persuade drivers to drive the vehicl RC HELI LIPO BATTERY