Many accidents occur at night. It's safe to be seen from a distance when riding bicycle. Equip yourself with this Rear Bicycle light that is powered by tripple A batteries( remote batteries) . This light is easy to install and remove atmost 10 seconds to remove it and install it. It has different modes on. The led light has 3 features. And the Laser light has 2 features. They can both function at the same time. Very beautiful in night ride.