The Universal Road Flare Kit contains 4 extremely durable, rechargeable 18-LED flares that are a safe alternative to incendiary flares. These flares are smokeless, flameless, non-toxic, waterproof, crushproof and come with an impact resistant rubber housing. Visible up to 1 mile. The metal charging/storage stand is mountable to any vertical or horizontal surface. A velcro strap keeps all flares secure in the stand. It may be charged 2 different ways. 1. Plugged directly into your vehicle s 12V electrical system or 2. plug into any 120V electrical wall socket. Both charging methods are included. When using the 12V power cord option, installation should only be handled by a certified vehicle mechanic.