The LED Bike Caution Light is our patent product; it can be installed on different
part of bike. Open it while riding on the dark night it can give signals to the
following cars that there is someone in front and keeping distance. So, it is
a great device to keep riders' safety. And it just cost 1.5usd/pcs,so I think everyone
can afford to buy it. As there are so many bikes in the world,  it will obviously
enjoy a good sale.