Soundoff Signal EMPS4STS2A Mpower® Hd LightSoundoff Signal EMPS4STS2A Mpower Hd 4" Light, 18" Hard Wire W Sync Option, Sae Class 1 Ca Title 13, 9 32 Vdc, Clear Lens, 6 Led, Single Color Amber Features Single, dual and tricolor capabilities Patented, one piece silicone lens and optic design delivers advantages over conventional polycarbonate lenses A smaller footprint with maximized candela output Greater resistance to gravel pitting, scratching or cracking Improved sealing to prevent water