1. Top Cover for Airtag: This bike headset cap allows for easy installation of an for Airtag, providing location tracking and preventing loss of your bicycle. 2. High Concealment: The bike headset cover tracker mount holder has high concealment, making it less likely to be noticed by potential thieves, ensuring enhanced security for your bike. 3. Waterproof Design: With its waterproof design, this bike headset cap can withstand various weather conditions, keeping your for Airtag or bottle cap protected from moisture. 4. Easy Installation: Installing this bike headset cap is a breeze, requiring no special tools or complicated procedures. Simply replace your existing headset cap with this innovative accessory. Color: black Material: plastic Package Contents: 1 x Hidden Bike Headset Top Cap 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.