Which alarm device?

Hi,
I am playing around with alarmo and my zigbee door and motion sensores and it seems to work very well. Now i am thinking about what alarm device i should use. There are not many zigbee alarm sirens available atm and i don’t know if it possible to use this sirens in the following way:

Someone enters the house and the siren will give out small beeps for 30 seconds and if the alarms system will not disabled in this time the siren will give out the full sound.
I dont know if its possible with a “normal” zigbee siren?

Another idea would be to use a Wifi Speaker and give out some warn sound for 30 seconds and after than a loud alarm sound but i don’t know if Home Assistant can handle this and the Speaker should not need much power in standby.

Can you give me some advice which devices i can use for my project?
Thx forward