Features: The car door lock system can provide an easy way to control your car. Remotely lock and unlock your car. Central door lock automatically. Remote car location. Remote trunk release. Rising power window. Electric/pneumatic central door lock optional. LED warning light: flashing warning after locking, indicating that the car is locked. Can be connected to the speaker: It can be connected to the speaker as needed (the speaker own),while the remote control door, there are one or two sounds of the speaker. It only needs to be equipped with a central locking system to install: suitable for many models with only central control and no remote control. Universally for any cars. Specifications: *Control Box Size:90*65*32 mm(L*W*H) *Distance:About 60-100 meters *Working Voltage: 12V *Working Current:15mA *Indicator Current: 15mA *Working Frequency: 433.92MHZ *Working temperature: -40°C to 80°C Package include: 1 x Control box 2 x Remote Controllers 1 x Wire 1 x LED connection wire 12 x Operation instruction