... -alarm. 3) dB/M: 110/115/120dB Horn Siren for home alarm system Feature:DIY, Easy-to-operated. Auto-alarm.It ... triggered. Applications:Integrated with outdoor field, home, farm, business store, public plaza security.Widely used for residential area, office, workshop, school, ... factor-y, Hospital.Widely used for bank, electric power Dept. Oil Dept, financial Dept.Police Dept ...