Product Features in BOLD are required.
Choose Voltage:
120 Vac (95-240 Vac range) 
24 Vdc (24 Vdc/Vac) 
Choose Optional Model PWEF with No Buzzer, or PWE Model with No Buzzer and No Flash:
PWEF with No Buzzer Subtract ($10.95)
PWE with No Buzzer No Flashing Subtract ($24.95)