Features: Using high-strength PC plastic, it provides excellent waterproof performances and can effectively protect internal equipment even when riding in rainy weather. The unique bike wheel component clip structure ensuring that locator remain stable and does not move on bumpy roads. Precised openings designed specifically for smart wearable devices ensuring unobstructed transmission. Super lightweight design, without increasing the burden on the bike, maintaining the flexibility and speed of riding. It can effectively protect your locator from damage such as wear and scratches. Specifications: Component: PC Plastic Size: approx. 9.2x4.0cm/3.62x1.57inch Attribute: Clear Black Applicable Model: for Dedicated Model Anti Loss Locator Technical parameters: waterproof Use scenarios: cycling, outdoor sports, commuting Practicality: Effectively protect locator to prevent loss and damage without affecting reception Package Includes: 1Pc Waterproof Protective Cover note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.