Generation 4 Tir 3 watt LED technology Voltage: 12VDC Traffic adviser Patterns on separate switch Self contained internal flasher 3 LEDs in every module. (30 3watt LEDs total). Sleek design with clear lens for stealth look 15 Selectable flash patterns Includes wire harness for easy installation Brackets included for mounting Flash Pattern Indicator Built in control box Integrated Traffic Direction feature Self contained internal flasher Size: 17in L x 1.5in W x 4in D each side / Glare protector 6in Length inner side