【Smart Arrow Turn Indicator Light】: Bike tail light feature Upgraded Arrow LED indicator turn signals. The unique arrow design attracts the attention of those around it. When the turn signal is turned on, the arrow indicates the direction you want to express more clearly, which can better improve the safety of riding whether used at night or during the day.【11 Modes-Timely Convey】: 11 modes can be adjusted, and the bike tail light can be paired with wireless remote for timely communication. Install the remote on the handlebar, press the button on the remote according to your needs, and the bike lights will respond in timely, reminding nearby pedestrians and vehicles to ensure your safety while cycling.【High Quality ABS Material】: Composed of high-quality ABS+PVC, the ABS material shell is not only more sturdy and has a longer service life, but also has strong transparency. It is equipped with ultra bright LED beads, which have super brightness when used at night, ensuring safe riding. IPX5 WATERPROOF design.【USB Fast Rechargeable】: Equipped with a large capacity 800mAh high-quality battery, charging only takes 1-2 hours. After being fully charged, it can be used for 4-12 hours. There are various charging methods, and you only need to connect the bicycle tail light to any USB device. For example: laptops, power bank, outlet adapter, or car charger.