1. Hidden locator reflective taillight bracket, not easy to be found, easy to find your bicycle 2. Equipped with 5 diameter seat tubes, 31.8mm/28.6mm/27.2mm/25.4mm/22.2mm, suitable for all kinds of mountain bikes 3. The reflective taillight can be adjusted up and down, making it safer to walk at night 4. Anti-theft screw design, ordinary wrenches cannot be disassembled, effectively preventing theft and protecting your property safety 5. Material: plastic 6. Note: The product only contains the tracker taillight bracket, and does not contain the GPS tracker
