Description: There are features of life waterproof and anti-deformation, so the bike wheel light is wear-resistant and suitable for various harsh environments. With the characteristics of vibration sensing and smart shutdown, the bike wheel light is easy to operate and brings you a good cycling experience. Made of high quality PC material, the light is eco-friendly and durable to use. The length of the product is about 5cm, the width of the product is about 2.8cm, the height of the product is about 1.6cm. It is suitable for spoke lights, decorative lights, tail lights, etc. Item Name: Bike Wheel Light Material: PC Battery: CR1220 Button Battery (Included) Mode: Three Lights (Red, Blue, Green) Flash in Cycles Life time: 14 hours Application Scope : Spoke Lights, Decorative Lights, Tail Lights , etc. Features: Multifunctional, Easy Installation, Long Life Size Details: 5cm x 2.8cm x 1.6cm/1.97 x 1.10 x 0.63" (Approx.) 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 Wheel Light ( with Battery) 1 x Bandage