advantages of this product:

There is magnet positioning flash flower fixed and switch can be manually opened. The emergency brake automatically closes after stopping two parts

Power supply mode:

Using 3 * AAA battery can guarantee continuous use for 8-10 hours
installation method:

Install the magnet sensor on the front and rear forks of the front and rear wheels, please pay attention to the magnet aiming at the black induction point in the lamp, and install the iron sheet and screw of the lamp on the steel wire with a screwdriver
note: The light belongs to one side of the flash flower, and the font can be switched to the front side after pressing the switch for five seconds.