The tail light features a built-in 500mAh rechargeable lithium battery and includes a charging cable. It can be charged via laptop computers, car chargers, mobile phone chargers, or power banks. With five light modes, the high-brightness LED lamp beads provide effective visual warning for most riding conditions. The waterproof design resists rain and humid climates, allowing normal use in wet weather. The tail light offers an eye-catching wide-angle beam, enhancing visibility from a distance and helping prevent accidents. High-quality LED directional lights are compatible with various bicycles. The product is compact and portable, with simple installation. It can be used on a variety of equipment and also serves as an emergency lighting device. Material: ABS plastic Size: Controller 5.6x3.7cm / 2.20x1.46inch, Light 10x3.5cm / 3.94x1.38inch Package Includes: 1 Piece Bike Tail Light 1 Piece Remote Control 1 Piece USB Cable 1 Piece Base Bracket 2 Pieces Strap