Product Features 1. This product adopts 3D printing technology, which is small and easy to carry. 2. It is highly concealed. It can install the For Smarttag locator under your bicycle seat to keep track of the location of your bike anytime and anywhere. 3. The product is divided into screw type and strap type. The screw type is fixed to the back of the seat with screws. The strap type can be fixed in the front and back of the seat, and can also be tied to other places. Product parameters Strap type net weight: 14.5g Strap type gross weight: 16g Strap type product size: 56*40*12mm (strap length 190mm) Strap type packaging size: 140*80*10mm bagged Screw type net weight: 20g Screw type gross weight: 22g Screw type product size: 75*55*10mm Screw type packaging size: 140*80*10mm bagged include: 1set For Smarttag2 bracket