Random or alternating selectable flash sequence. "Potted", solid state components. Rated for over 100,000 hours of use. Low amp draw (Less that 0.8 amps). Protects against moisture, contaminates & voltage spikes. High, impact resistant, polycarbonate housing. Protected against shock and vibration. Ideal for construction vehicles, utility vehicles, DOT and municipal vehicles. Meets SAE J1318 and J845. Flash Rate: 72/min. (Quint) Voltage: 12/24V DC. Non-Flashing LED Heads are available: Part # DLXTHU-8. 4" Round: 4.3" X 1.75" Available in Blue, Red, Amber, Clear