Features: 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: Control box size: 8.6 x 6 x 2.5cm (L x W x H) Distance: About 30 - 80 meters Working Voltage: 12V Working Current: <15mA Indicator Current:15mA Working Frequency: 433.92MHZ 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. Notes: This product does not have the alarm function Dear buyers, due to customs limitation, keys of the kit can not contain any battery. Please prepare batteries yourselves. Battery model: CR2016 Each key needs 2 pcs batteries, so one whole kit needs 4 pcs batteries.