1(ONE) BRAND NEW UNOPENED FACTORY SEALED : Light Up POWERDECAL. POWERDECAL is an LED backlit logo for your vehicle window. Device turns on automatically while driving at night via sensor technology. Device shuts off after 2 minutes once parked. Easy installation with quality 3M adhesion material. Just peel and stick, no tools required. Batteries and window clips are included. 4" in diameter.