These reliable safety flashers feature 18 highly visible, super bright LEDs that can be seen for up to 1 mile away. They can be attached securely to the back of a vehicle, truck, car, trailer, emergency vehicle, etc. with the built-in magnets. The 18 LED lights can be set to flashing or steady lights. Use for any emergency situation - at home or on the road. All weather resistant. Approximate size is 6-1/4" wide by 4" high. Will flash for up to 32 hours (or more) with four AA alkaline batteries. Currently available in red and amber only at this time. We may later stock them in green or white. Call for more information. Safety Flashers HF18R-PHD$18.95 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.