Features: Secure your bike trailer with this durability protectors, engineered for signal stability and cautious mounting to ensure thefts prevention and reliability trackings accuracy. Features waterproofed shell, rear hole for enhancing signal transmission, and simple installation with included key, this light weight 11g accessory withstands harsh weather. For commuters, cycling enthusiasts, and frequent traveler who prioritize anti thefts security and low profiles protecting during cycling. Perfect for rainy city commutes, or sunny leisures cycling, offering signal stability across diverse terrains and weather conditions. Compacts (75x40x13mm) and universals with most bike trailers make this ABS casing essential upgraded for seamlessly integration into any cycling setups. Specifications: Dimension:7.5x4cm/2.95×1.57in Component:plastomer Package Includes: 1pc Anti-thefts protecting case note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.