Foxfire’s original portable signal lite, the SL Series is an effective way to bring awareness and improve visibility to on coming traffic. 18 super bright led’s make it visible for over 1 mile in either the constant on or flash mode. Some of it’s many uses include: utility road work, emergency response, factory indicator lites, farm and agricultural applications, and distressed or disabled vehicles. The SL Series Signal Lites are equipped with vinyl magnets that are ideal for static use where no movement or vibration is present. Add heavy duty cup magnets, or the Adjustable Magnetic Base (AMB-SL) to hold lites securely in place when motion or vibration is a factor.