mode: 1.: When driving, the red light from the middle to the left and right sides of the streamer runs and then stays on {ie scanning mode} 2.: Presenting a bright red, running back light from the middle to the left and right sides 3.: Flow from left end to right end when turning right, and flow from right end to left end when turning left. 4. In the case of double flashing, the middle section is long and bright and flows to the left and right.