Blinking Flashing LED Auto Theft Deterrent Fake Car Antitheft Alarm System Flash Blink, AAA Battery Box Can Be Hidden So Only The Light Shows, On/Off Switch, 2 Window Warning Decals (Green) Lower price found: Search Amazon for B00M3F38NQ Bright flashing LED. Choose color to match your car's interior lighting Runs for weeks on two AAA batteries- (not included) use on / off switch to extend run time 2 Window Warning Stickers - STOP! Silent Alarm and GPS Tracking LED lasts 100,000 hours No vehicle wiring required