WHAT WILL YOU GET? ?1 bracket (top and bottom) and 2 straps. ✓?HIGH QUALITY MATERIAL?Ainiv AirTag Case is made of high quality PLA plastic, which is waterproof, eco-friendly, odorless, stain-resistant and seamless. ?SMART DESIGN?Thanks to the grooves on the back, the bracket can fit snugly on your seatpost. This improves adhesion and the reflector surface becomes larger. ?SCOPE OF USE?Suitable for any mountain bike, electric bike or city bike. It locate your bike, play sound and use all Airtag functions (iOS & Airtag required). HIDDEN DESIGN?Ainiv Airtag bike case hides your airtag perfectly, you don't have to worry about it being stolen, with the hidden design and security screws, you don't have to worry about it being stolen or disassembled.