The Night Raider LED Scanner can be used as an addition to your security system, a scanning third brake light, or a standalone scanner. It is 15 inches long and features 30 micro-processor controlled LEDs for fluid scanning motion you have to see to believe. Use it as a scanning security system status indicator on your dashboard or in your grille, or use it in your rear window as a high-visibility third brake light. You can mount it in your grille, under seats, or anywhere else for a head-turning scanning effect. No security system is required, but it includes a signal wire that can be hooked up to scan with your alarm. Rated for interior or exterior Use. Installation & mounting hardware and instructions included.