The Matrix Air Cage an enhanced version of the Matrix Team Cage features a built-in discreet holder for an Apple AirTag. Its minimalist dual-side-loading design hides the AirTag between the bottle cage and bike frame for added security. Made from lightweight durable Composite Matrix material it has an IPX7 waterproof rating to keep the AirTag dry. Virtually indistinguishable from a standard water bottle cage it utilizes Apple's "FindMy" app to locate a stolen or missing bicycle and is verified to work with Apple's ultra-wideband signal. It includes stainless steel TR25 security bolts and an included tool bit.Includes TR25 security bolts and toolUltra-wideband tested