This Vehicle Car Truck Emergency Hazard Warning Light is easy to use. You just plug it in to your lighter in the car/truck and stick it top on car/truck. It is magnetized so it holds nicely. It is safe to use in all weathers. It is a hard plastic. It flashes nicely and I could see the light from far away. Made well and good quality. I recommend. The shipped was package well and was here in just a few days. I was offered the opportunity to test and review this product for my honest and unbiased opinion.
Update: This flashing light was my very 1st review item I got. Its been 4 years and still works great for my husbands work truck.