This product is a bike tail light, adoption of premium and durable rubber, aluminum alloy and ABS material. Life waterproof adapts to more environments. It can protect your safety while riding at night. You will install it without any effort. The for you. Features - Material: ABS, aluminum alloy, rubber. - Size: Approx. 4.00X4.00X3.50cm/1.57X1.57X1.38in. - Scope of Application of Rubber Belt: It can be stretched 12cm/4.72inch, suitable for handlebars or seatposts with a diameter of 22-38mm/0.86-1.49inch. - Charging Mode: USB charging. - Lighting Mode: 100% lighting, 50% lighting, slow flicker, fast flashing. - Adoption of premium rubber, aluminum alloy and ABS material, sturdy and durable for long-term use. - High brightness, ensures your safe riding and effectively reminds other cyclists or pedestrians. - The 4 lighting modes can be switched at will, let you enjoy riding. - Simple but decorative, it is not only a practical bike safety light, but also a bike decoration. - Waterproof design, suitable for outdoor cycling, you will like it. Package list: 1 x Bike Tail Light 2 x Rubber Straps 1 x USB Cable