Highlights:
Due to customs security inspection reason:
1.Products from China not contain battery.
2.Products from overseas warehouse may or may not contain batteryrandom delivery.
3.This product does not have the alarm function

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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.
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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)
2 Remote Controllers size: 6.2 x 3.3x 1.2cm (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.