Small in size(8cm in length), easy to fix, the fllashing stepper can bring you lots of convenience and happines when drving. Features: 1. Two battery inside, the battery can last for 2 months. 2. Adjustable flashing style. When you touch the stepper, it will flash. Red, yellow and green flash for you choose. 3. In daytime, it will close automatically. 4. Accessoris inside the package, 2 screws and 1 tool for screwing.