Low Profile Mini Sounder, Indoor/Outdoor, Voltage 9 to 28VDC, Amps 4 to 33mA, White, Decibels 82 to 100dB @ 10 ft., Height 3 In., Width 3-5/8 In., Depth 1-7/8 In., Housing Material ABS Plastic, Mounting Panel, Wall, Operating Temp. -13 Degrees to 158 Degrees F, NEMA 4X Rating, Standards CE