I used a hardwired siren let me see if I can find which Mg Electronics 15 Watt Piezo Dynamic Dual Tone Siren https://www.amazon.com/dp/B002PN8YT4/ref=cm_sw_r_cp_api_i_deazFbPRXXG59
This one works just wire and to the bell + and bell - on the back of the pane