Features: Locate your bike: Have you ever lost your bike? You will no longer have this trouble after owning a bike Airtag Holder. Fix it on your bicycle frame with an Airtag, you can track your bicycle at any time. (AirTag not included). Invisible design: A secure way to mount AirTag under the bottle cage. Suitable to prevent your bicycle from being stolen, making it difficult for robbers to find or disable it. (Bottle cage not included) Perfect and anti-Shake: Fits AirTag like a glove and keeps it stay firmly in place. No shaking around when riding, whether you're out riding fast on road or bumpy trails. High-quality material: It is made of durable ABS material, and its safe and waterproof design can adapt to various outdoor weather. No need to worry about water leakage during rain or washing the bike. Simple installation:We are equipped with screws and installation tools, 65mm (the most common) common standard bicycle installation distance, simple operation. Package Includes: 1 Set Bike Tracker Protect Case with 1 Wrench and 2 Screws ( Air Tag not included) Specifications: Material: ABS Size: Approx. 77x37mm/3.03x1.46 inches Color: Black, Red, Blue, Yellow, Gray, Orange note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.