2-way – Audio well in the old days it was done by a wired buzzer that you had to walk to door to open it
Well the moden ones you can talk to the people and they can hear you that why its called a two way system . So what can it do well a basic one you can just talk to people that have pressed the buzzer. or you can see them on the camera and the top end of the market you can control the door with your smartphone. So yes they have changed and you can have even two way on a standard door bell that has a camera .
why not contact electric locking systems for free  advise and help
call us on 01202 941050
or email us at sales@electriclock.co.uk
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