it can be done with the wireless car key provided

its simple!! its done by using a wireless car key!!
he pressed on car lock button and it locked the car automatically. (**i think typing the code was a show off or else he would have showed us what happens on the phone screen after pressing send button isn't it??**)
now a days every single car has this technology !!

some body could be on the side with the keys

How? i muss have any special chip in car?