Koolertron LED Strobe Amber Emergency Warning Mini Strobe Light Bar Magnetic Base (Blue) 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 ) With a just one button to switch between 7 modes, great for undercover or to use when needed Lifepan: 30000 hours Number of LED: 24