FICBOX Universal Car Keyless Entry System Description: 1.Door lock (press button"lock" once) 2.Door unlock (press button "unlock" once) 3.Car search 4.Raise window output 5.Remote trunk release 6.Electric and pneumatic door locks (Factory default setting is electric door lock) Specification: 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 meters Working Voltage: 12V Working Current: <15mA Indicator Current:15mA Working Frequency: 315MHz Package Included: 1 x Control box 2 x Remote Controllers 1 x LED connection wire 1 x Wire 1 x Operation instruction SUGGESTION: The installation had better to be operated by the technician in 4S automobile stores or formal automobile repair stores, rather than yourself.