Hidden and Unexpected Position]: An unexpected position, completely hidden it under the bicycle seat,and will find the for except yourself. [Special Customization]: for mount is modeled completely according to the size of the for , and it is perfectly embedded with no extra space. Suitable for most bicycles seat. [Signal is Not ]: bike tracker anti-theft hidden works perfectly. You don't have to worry about signal strength issues. [Sturdy and ]: bike GPS tracker anti-theft is very stable and not easy to loosen. Both covers are made of waterproof material, which can protect your bike for even when riding on . [Mounting was Simple]:This bicycle for securely holds an for to your bicycle with no rattling.<br><br>color: Black Material: plastic<br><br>Package Contents: 1*Bike Mount Hidden Bracket<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.