Welcome to our store！</br> 1、The standard Class IIIA is used to remind others to keep their distance, and the taillights can ensure your safety when riding in the dark 2、The buckle adopts an adjustable lock hoop, which is suitable for more bicycle types and can meet the needs of different users and different riding equipment 3、With waterproof characteristics, you don’t have to worry about riding in the rain, which can increase the safety of your riding 4、Provides a variety of different lighting modes. Including constant light, fast flashing, slow flashing, you can change the light mode according to your actual needs 5、Can be used for jogging, walking, cycling, car emergency, road emergency and camping, etc <p class="wang-edit-text"><p class="wang-edit-text"> Item Type: Bicycle Light Battery: 2 x 1.5v AAA Battery (without battery) Buckle Parameters: Suitable for Approx. 20-31mm/0.8-1.2in Diameter Seatpost Pipe Waterproof: IPX-II Grade Waterproof Lighting Mode: Constant Light, Fast Flashing, Slow Flashing, Left to Right Slow Flashing, Right to Left Slow Flashing, Left to Right Fast Flashing, Left and Right Flashing Back and Forth Parallel Line Lights: Parallel Lines, Gypsophila <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Bicycle Light1 x Installation Firmware Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>