1. This bike headset cover can easily install a tracker, providing location tracking and preventing bike loss. 2. The bicycle headset cover tracker mounting bracket has high concealment and is not easily discovered by potential thieves, ensuring enhanced bicycle safety. 3. Waterproof design, can withstand various weather conditions and protect your equipment 4. Material: aluminum alloy + plastic 5. Compatible with most bikes on the market 6. Beer cap model: 28.6mm pipe does not need to install an adapter ring; 31.8mm pipe needs to install an adapter ring