1. Anti-Theft Locator Slot: Designed with a slot for a locator (locator not included), this bike bottle GPS tracker cage helps prevent bike theft by accommodating tracking devices. 2. Aerodynamic Design: Featuring a streamlined shape, this bike water cup holder reduces wind resistance, enhancing your cycling speed and efficiency. 3. Adjustable Fit: Equipped with oval mounting holes, this bicycle water bottle cage allows for vertical adjustment to fit a variety of bikes with different water bottle cage mounting distances. 4. Smooth Edge Protection: The rounded edges of this bike water bottle bracket prevent scratches and protect your water bottle during use, ensuring durability and safety. 5. Easy Installation: This anti-lost protective bottle holder is quick and easy to install, requiring no complex tools or special knowledge, making it accessible for all cyclists. Colour:Black Material:plastic Package Contents: 1 * Water Bottle Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.