1
what’s the use?
carrying keys without pressing the unlock button on the key to open the door into the car.
2
Advantages:
* Removed find and carry out car keys you can open and close the car door, convenient and face.
3
You know what?
Generally vehicle with a keyless entry system in the vicinity of the door handle is provided with sensing means, when the touch sensitive regions or buttons to complete opening, the locking operation. With keyless start function can be realized from the bus driver to get off to go home without taking out the entire car keys.
4
Principle:
[123 ] 
with a keyless entryThe built-vehicle system a plurality of low frequency antenna, generally around the door, the car, the trunk, the rear bumper are distributed. Coverage by adjusting the voltage. When the user carrying the smart key, triggers the corresponding function (e.g., a button or handle on the door handle of the measured capacitive sensor), respective antenna began to be driven to search for “legitimate key” within the coverage area exists, when the key is received the low-frequency triggering instruction, by RF return the vehicle to the authentication ECU, ECU decodes the decrypted authentication information, the corresponding execution unlock the password lock function correctly.