Xprite Blue Law Enforcement LED Mini Bar Strobe Light w/Magnetic Base Magnets strong enough to go up to 40mph Installation: Plug this into your 12V cigarrette lighter and with the magnetized bottom place on any exterior metal Panel Dimensions: 12" ( wide ) x 6.2" ( deep ) x 2.8" ( height ) / Cable length: 10 FT / Number of LED: 240 / Lifepan: 50000 hours With a just one button to switch between 7 modes, great for undercover or to use when needed Easy to install, Mounted with magnets to the top, and plug into a 12V cigarette lighter.