X5 Wireless Remote Control Bike Taillight Have you ever owned a smart bike taillight with auto brake light Just like a car taillight, but it's cheaper and smaller A smart wireless remote control on the bicycle handlebar that you can choose to turn left/right, emergency flashing, double ground warning line on the ground to alert the cars or pedestrians to keep a safe distance from you. Such a cool and smart bicycle tail light will help you attract more attention at night to protect you! Note: 1.If not in use for a long time, please make sure the tail light has been turned on by first pressing the button on the side of itself before using the controller. 2.There are red LED lights under each key of the remote control. It will light up to indicate the corresponding status. Ground lane alarm After pressing the "Ground Line" button on the remote control, the two wings of the bicycle taillight project two warning lines on the ground, that alert other vehicles and pedestrians to extend your