Usage: very simple, direct suction on the front glass. Straight plug cigarette lighter plug can be, there are switches online. Application: construction vehicles, tow trucks, snow plows, funeral escorts and hearses, security patrol vehicles (SPV), Emergency medical vehicles, ambulances, paramedic fly-cars, slow vehicles, construction vehicles. Specifications: Material: High Quality Polycarbonate Number of LED: 16 Housing Color: Black Lens Color: Clear Light Color: Amber Voltage: 12V Working Wattage: 16W (1W/LED) Size: 8.7" ( width ) x 2.05" ( height ) x 5.9" ( depth ) Cable Length: 186cm Lifespan: Over 50000 hours Strobe patterns: 18 different selectable Package includes: 1 x 16 LED Strobe Light 1 x Cigarette Adapter 1 x set of Suction cups 1 x set fo screws.