Mounting is simple and secure with an IPX7 waterproof-rated twist-lock design held together with an included TR25 security bolt, which also clamps it to the saddle rails. Once mounted, the hidden tagger can be used with ApplesFindMynetwork to help locate a lost or stolen bicycle. It is also tested and verified to work with the ultra-wideband signal. Key Features:Smart addition to any bicycle.Built from lightweight, durable composite matrix material. Attaches underneath saddle by clamping onto rails. IPX7 waterproof-rated twist-lock design. TR25 security boltOnce mounted, tagger can be used with Apple's "FindMy" network. Dimensions:Width: 59.1mm.Length: 58.5mm.Height: 22.6mm.Weight: 26g w/o Airtag.*Apple AirTag not included. *AirTagis a trademark of Apple Inc., registered in the U.S. and other countries and regions.