The Secure Tag Holder offers a unique way to install a tracker onto your bicycle frame using the bottle cage mounting holes, so you can track and locate your bike in the event of theft Designed to track your bike down in the event of theft from a long range. At closer range activate the built-in AirTag speaker to help you better locate the tracker and your bike Housed in a machined aircraft grade 6061 aluminum body Fits securely under your bottle cage Supplied with 2 x T25 x 25mm/0.98" and 2 x T25 x 16mm/0.62" security Torx bolts and 1 x security key Compatible with Apple AirTags (Sold separately) Slotted bottle cage mounts are designed to work with most existing standard bottle cage mounts (64mm spacing) and offer more adjustability