Ultra-long Standby: LEDs provide up to 17 hours of reliable brightness for extended use.Easy Installation: Attaches securely to all types of bicycles, even on unpaved roads.High-quality: Provides a high brightness of 30 lumens for enhanced visibility.Waterproof and Reliable: Splashproof protection ensures safe riding in rainy conditions.Versatile Application: Suitable for mountain bikes, bicycles, and outdoor riding activities. Introducing our Bike Rear Light, the perfect companion for your night cycling adventures. This versatile light not only provides exceptional lighting but also doubles as a portable rechargeable battery. With its convenient USB port, you can easily connect it to your computer, car charger, USB socket, or power bank for charging on the go.Designed with a lightweight and compact form factor, this rear light effortlessly slips into your pocket or car bag. Its wide-angle beam emits an eye-catching light that can be seen from blocks away, ensuring your safety on the road. Say goodbye to worries about being knocked over by others.Suitable for most bicycles including mountain bikes, road bikes, and folding bikes, this rear light is a must-have accessory. With up to 17 hours of reliable brightness, you can trust its long-lasting performance during your rides. Installation is a breeze, as it easily attaches to all types of bicycles and holds securely even on unpaved roads.Crafted with high-quality LED lamp beads, this rear light delivers a high brightness of up to 30 lumens. It is also waterproof and reliable with splashproof protection, ensuring safe driving in the rain. Item Name: Bike Rear Light Material: Aluminum Alloy, ABS, PC Waterproof Grade: IPx6 Battery Life: 17hFeatures: Rechargeable, Waterproof, Easy Installation Size Details: Diameter: 3.3cm/1.3" Length: 5.1cm/2.01" Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Rear Light 1 x Data Cable1 x User Manual