The Lezyne Matrix Bike Tagger offers you a safe way to mount a tracker on the frame of your bike. You can easily attach the Bike Tagger under the bottle holder or the multi-tool holder on modern frames. This allows you to track down and localize your bike in the event of theft. The Bike Tagger housing is made of durable composite material and is waterproof (IPX7 certification). The case's rotating feature allows for easy installation of the Apple Air Tag, and the included T25 security screws provide additional security. Tracking down a missing bike has never been so easy and discreet.