Find decorative accent pieces at Target.com! Powerdecal is an innovative led backlit logo for your vehicle window. Device turns on automatically while driving at night via sensor technology and shuts off after 2 minutes when parked; once installed you never need to touch it. Powerdecal offers a clean exterior while maximizing visual impact with full color and contrast at night. Easy installation with quality 3m adhesion material, just peel and stick, no tools required. Uses three standard aa alkaline batteries; included.