Features: *One-key start function *Remotely lock and unlock your car *Direction light flashing *LED indicator *Remote car location *Remote trunk release *Rising power window *Universal for any cars Specification: *Distance: About 30 - 80 meters *Working Voltage: 12V *Working Current: <15mA *Indicator Current:15mA 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. Battery model: CR2016 Note: The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom’s policies and EU Product Safety and Compliance laws.