Features:Remotely lock and unlock your carDirection light flashingLED indicatorCentral door lock automaticallyRemote car locationRemote trunk releaseRising power windowUniversal for any carsSpecification:Control box size: 8.6 x 6 x 2.5cm (L x W x H)2 Remote Controllers size: 6.2 x 3.3x 1.2cm (L x W x H)Distance: About 60 - 80 metersWorking Voltage: 12VWorking Current: <15mAIndicator Current:15mAWorking Frequency: 315MHzPackage Included:1 x Control box2 x Remote Controllers1 x LED connection wire1 x Wire1 x Operation instructionSUGGESTION: The installation had better to be operated by the technician in 4S automobile stores or formal automobile repair stores， rather than yourself