What notice will be suitable for security notice?

Question

Hi. I'm currently installed camera and alarm system for me to make a safe room.

Once someone open my door without my permission, It will automatically alarms and also camera does work for 24hrs.

I want to put some notice onto my door so everyone can see .

Can u make any short message that does make a sense please?

Thank u^^

Hi. I'm currently installed camera and alarm system for me to make a safe room.

Once someone open my door without my permission, It will automatically alarms and also camera does work for 24hrs.

I want to put some notice onto my door so everyone can see .

Can u make any message that longer than 10words which describes above important notice and makes people believe afraid.

For example.

Without XXX's permissiono. It will automatically report security company once the door opend.

Please! help me to find out !

Thank u^^

Answer 1

Room is monitored by security system.
Don't enter without permission or alarm will sound.

or

Room is monitored by security system.
Don't enter without permission

Answer 2

Permission Needed