SECURITYMAN SM-103 Wireless Outdoor Siren Add-on Wireless Outdoor Siren For Air Alarm System Receiving Distance: &gt;=300ft In Open Areas Max Alarm Sound With Flash: 3 Min Siren Sound: 120db Operating Power: 100v-240v Ac, 50hz Receiving Distance: _ 300 Ft In Open Areas Maximum Alarm Sound With Flash: 3 Min Siren Sound: 120 Db Operating Power: 100 To 240V Ac, 50 Hz Active Power Consumption: _ 450 Ma