Model 11-1005SF All Purpose LED strobe style flasher • Solid-state • Waterproof • 7 flash patterns Standard Patterns: Single, Double, Quad, Alternating, Alternating Variable Speed, Simultaneous Variable Speed, Random Strobe-Style Patterns: Double, Quad, Quint and Mega Alternating Flash; Double and Quad Simultaneous Flash; Random • 2” H x 4” W x ½” D • Use only with LED lights. Click on image to enlarge.