This it is customized 12V customized stop Light Fitting, which is for car using.Double flash is a time interval of about 0.5 seconds when four turning lights are on at the same time. Play a warning, prompting, role. Generally yellow brake lights are red because of the safety of driving. Red is more eye-catching and helps to remind the rear car. Now some cars have the external LED taillights. When braking, the lighting effect is better and the speed is faster. Safety has been improved.
If you have any interested, please advice any time!