Adjustable LED bike lights with USB charging provide bright and security illumination for day and night cycling. Features: Four Adjustable Light Modes: Easily switch between four brightness levels suitable for different cycling scenarios. USB Rechargeable with Auto Power Off: Built-in charging system shows red while charging and green when fully charged, protecting the lights in real time. High Brightness LED: Equipped with 3 LED bulbs for long-distance illumination with clear and soft light, enhancing cycling security. Durable Design: Rounded lamp cover with gap design prevents damage from impacts and drops. One-Button Mode Switching: Quickly change lighting modes for versatile use in various cycling environments. Specifications: Material: Aluminum Alloy + ABS Size (LxWxH): 4.5 x 4.0 x 5.0cm Power Supply Method: Type-C USB Charging (Adapter Not Included) Battery Capacity: 300mAh Color: Black Light Color: Red, White Package Contents: 2 x USB Rechargeable Bike Front and Rear Lights 2 x Data Cables 2 x Straps Please Note: Due to manual measurement, there might be a tolerance in the product size. Due to lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance.