●【Compatible With】Compatible with most of the bike which is commercially available, such as MTB bike, road bike, folding bike, etc. ●【Anti-Theft】Anti-theft design hidden your airtag under water bottle cage, not easy being stolen by thief ●【Security Screws】 A specialized wrench is included used to fit on the anti-burglar screws ●【Dustproof & Anti-Shake】Fully enclosed design provides a all-rounded safeguard to your Airtag, preserve your Airtag from dust and vibration ●【Lightweight Design】Only weigh 9 grams