Do you know what kind of wireless receiver you have on your panel? Is it an RF keypad? These wireless siren need an RF Keypad or a 5883H Bi-Directional receiver to function correctly. The 5881 RF receiver doesn’t meet the requirements.
I believe with this siren, you do need to have it plugged into an outlet.
Wireless zones can only be programmed in zones 9-48 on the vista20p.
The only thing different should be the loop number depending on what you are needing if you have pets