... ) Auto-alarm. 3) dB/M: 110/115/120dB Horn Siren for home alarm system Feature:DIY, Easy-to-operated. Auto-alarm.It ... . Applications:Integrated with outdoor field, home, farm, business store, public plaza security.Widely used for residential area, office, workshop, school, factor-y, Hospital ... .Material: ABS Plastic cabinet; Iron stand thickness: 1.55 mm, black color. Size: 100mm*Æ95.