Audible Alarm Type Alarm, Visual Indicator Type No Visual Indicator, Voltage 12/24V AC/DC, Decibels 0 to 105dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Mounting Surface, Height 4 in, Width 3.5 in, Depth 2.8281 in, Vibrating No, Housing Material ABS Plastic, Rating IP 54, Operating Temp. 14 Degrees to 122 Degrees F, Features This Black Electronic Alarm is Part of the Range of Multi Sound Sirens and Alarms Harmony XVS, Standards EN/IEC 61000-6-2, EN/IEC 61000-6-3, UL 464, UR