Stand Alone Door - Buzz Only

[J_G]

Can someone give me the easiest solution....

Stand alone door, when it is left open for a buzzer to go off constantly, unlike a chime where it chimes once. It needs to buzz constantly, could I have equipment names please,

Thanks in advanced

[fozzies]

Simplest solution one door contact, one buzzer, one 9volt battery, all wired in series.

Professional solution, product called exitguard, google it

[norman]

http://www.hoyles.com/acatalog/exit-guard-door-alarms.html

[james.wilson]

or any decent standalone access keypad, but as above

[J_G]

Thanks