It have 18 different flash patterns.Anti-collision， anti-dust and splash-proof.Each unit consists of 4 high intensity LEDs with optic lenses.Self-contained light head， no external flasher required.Last pattern memory recall.Built-in heat sink.Low power consumption， quick instant start-up time.Optional high and low intensity.Compact and light weight， easy to use.Weatherproof ready for exterior mounting.Black flange included for protection and stealth.No pollution， no noise， no electronic interference， more efficient.Universal fit for any cars， SUVs， or trucks.Installation：Red wire and yellow wire connect the anode， black connect the cathode. The other two lines is Excess， you can ignore it!!Specifications：Type: Car Strobe Flash Lightning LightNumber of LED Per Piece: 4Voltage: 12-24 VCurrent: 333mAPower: 4 WHousing Color: BlackLight Color: AmberSize:126 x 29 x 27 mmPackage included：1 x 4 LED Car Strobe Flash Lights1 x Protection Pad2 x Screws